# Go Math Grade K Answer Key Chapter 9 Identify and Describe Two-Dimensional Shapes

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## Go Math Grade K Chapter 9 Answer Key Identify and Describe Two-Dimensional Shapes

Students must get an interest in math from childhood itself. So make your children fall in love with math by showing the Go Math Grade K Chapter 9 Answer Key Identify and Describe Two-Dimensional Shapes. By following our HMH Go Math Answer Key your child will get the knowledge slowly by seeing the solved images. So, Download Go Math Grade K Solution Key Chapter 9 Identify and Describe Two-Dimensional Shapes pdf for free.

Identify and Describe Two-Dimensional Shapes

Lesson: 1 Identify and Name Circles

Lesson: 2 Describe Circles

Lesson: 3 Identify and Name Squares

Lesson: 4 Describe Squares

Lesson: 5 Identify and Name Triangles

Lesson: 6 Describe Triangles

Mid-Chapter Checkpoint

Lesson: 7 Identify and Name Rectangles

Lesson: 8 Describe Rectangles

Lesson: 9 Identify and Name Hexagons

Lesson: 10 Describe Hexagons

Lesson: 11 Algebra • Compare Two- Dimensional Shapes

Lesson: 12 Problem Solving • Draw to Join Shapes

Review/Test

### Identify and Describe Two-Dimensional Shapes Show What You Know

Shape
DIRECTIONS 1–3. Look at the shape at the beginning of the row. Mark an X on the shape that is alike. 4–6. Count and tell how many. Write the number.
Question 1.

Question 2.

Question 3.

Count Objects
Question 4.

Question 5.

Question 6.

### Identify and Describe Two-Dimensional Shapes Vocabulary Builder

DIRECTIONS Circle the box that is sorted by green vegetables. Mark an X on the box that is sorted by purple fruit.

### Identify and Describe Two-Dimensional Shapes Game Number Picture

DIRECTIONS Play with a partner. Decide who goes first. Toss the number cube. Color a shape in the picture that matches the number rolled. A player misses a turn if a number is rolled and all shapes with that number are colored. Continue until all shapes in the picture are colored.

MATERIALS number cube (labeled 1, 2, 2, 3, 3, 4), crayons

### Identify and Describe Two-Dimensional Shapes Vocabulary Game

DIRECTIONS Say each word. Tell something you know about the word.

DIRECTIONS Place game pieces on START. Play with a partner. Take turns. Toss the number cube. Move that many spaces. If a player can name the shape and tell something about the shape, the player moves ahead 1 space. The first player to reach FINISH wins.

MATERIALS 1 connecting cube game piece for each player, number cube

The Write Way
DIRECTIONS Choose two shapes. Draw to show what you know about the shapes. Reflect Be ready to tell about your drawing.

### Lesson 9.1 Identify and Name Circles

Essential Question How can you identify and name circles?

DIRECTIONS Place two-dimensional shapes on the page. Identify and name the circles. Sort the shapes by circles and not circles. Trace and color the shapes on the sorting mat.

Share and Show

DIRECTIONS 1. Mark an X on all of the circles.
Question 1.

DIRECTIONS 2. Color the circles in the picture.
Question 2.

Problem Solving • Applications

DIRECTIONS 3. Neville puts his shapes in a row. Which shape is a circle? Mark an X on that shape. 4. Draw to show what you know about circles. Tell a friend about your drawing.
Question 3.

Question 4.
Answer: A circle has a curve shape with no sides and vertices.

HOME ACTIVITY • Have your child show you an object that is shaped like a circle.

### Identify and Name Circles Homework & Practice 9.1

DIRECTIONS 1. Color the circles in the picture.
Question 1.

DIRECTIONS 1. Color the circle. 2. Count forward. Trace and write the numbers in order. 3. Which number completes the addition sentence about the sets of cats? Write the number.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.2 Describe Circles

Essential Question How can you describe circles?

Listen and Draw

DIRECTIONS Use your finger to trace around the circle. Talk about the curve. Trace around the curve.

Share and Show

DIRECTIONS 1. Use your finger to trace around the circle. Trace the curve around the circle. 2. Color the object that is shaped like a circle.
Question 1.

Question 2.

DIRECTIONS 3. Use a pencil to hold one end of a large paper clip on one of the dots in the center of the page. Place another pencil in the other end of the paper clip. Move the pencil around to draw a circle.
Question 3.

Problem Solving • Applications

DIRECTIONS 4. I have a curve. What shape am I? Draw the shape. Tell a friend the name of the shape.
Question 4.

HOME ACTIVITY • Have your child describe a circle.

### Describe Circles Homework & Practice 9.2

DIRECTIONS 1. Use a pencil to hold one end of a large paper clip on one of the dots in the center. Place another pencil in the other end of the paper clip. Move the pencil around to draw a circle. 2. Color the object that is shaped like a circle.
Question 1.

Question 2.

DIRECTIONS 1. Which shape has a curve? Color that shape. 2. Point to each set of 10 as you count by tens. Circle the number that shows how many grapes there are. 3. How many tiles are there? Write the number.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.3 Identify and Name Squares

Essential Question How can you identify and name squares?

Listen and Draw

DIRECTIONS Place two-dimensional shapes on the page. Identify and name the squares. Sort the shapes by squares and not squares. Trace and color the shapes on the sorting mat.

Share and Show

DIRECTIONS 1. Mark an X on all of the squares.
Question 1.

DIRECTIONS 2. Color the squares in the picture.
Question 2.

Problem Solving • Applications

DIRECTIONS 3. Dennis drew these shapes. Which shapes are squares? Mark an X on those shapes. 4. Draw to show what you know about squares. Tell a friend about your drawing.
Question 3.

Question 4.
a square is a regular quadrilateral, which means that it has four equal sides and four equal angles. It can also be defined as a rectangle in which two adjacent sides have equal length

HOME ACTIVITY • Have your child show you an object that is shaped like a square.

### Identify and Name Squares Homework & Practice 9.3

DIRECTIONS 1. Color the squares in the picture.
Question 1.

DIRECTIONS 1. Which shape is a square? Color the square. 2. How many tiles are there? Write the number. 3. Trace the number of puppies. Trace the number of puppies being added. Write the number that shows how many puppies there are now.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.4 Describe Squares

Essential Question How can you describe squares?

Listen and Draw

DIRECTIONS Use your finger to trace around the square. Talk about the number of sides and the number of vertices. Draw an arrow pointing to another vertex. Trace around the sides.

Share and Show

DIRECTIONS 1. Place a counter on each corner, or vertex. Write how many corners, or vertices. 2. Trace around the sides. Write how many sides.
Question 1.

Question 2.

DIRECTIONS 3. Draw and color a square.
Question 3.

Problem Solving • Applications

DIRECTIONS 4. I have 4 sides of equal length and 4 vertices. What shape am I? Draw the shape. Tell a friend the name of the shape.
Question 4.
Answer: I am a square

HOME ACTIVITY • Have your child describe a square.

### Describe Squares Homework & Practice 9.4

DIRECTIONS 1. Draw and color a square. 2. Place a counter on each corner, or vertex, of the square that you drew. Write how many corners, or vertices. 3. Trace around the sides of the square that you drew. Write how many sides.
Question 1.

Question 2.

Question 3.

DIRECTIONS 1. How many vertices does the square have? Write the number. 2. Count and tell how many pieces of fruit. Write the number. 3. How many tiles are there? Write the number.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.5 Identify and Name Triangles

Essential Question How can you identify and name triangles?

Listen and Draw

DIRECTIONS Place two-dimensional shapes on the page. Identify and name the triangles. Sort the shapes by triangles and not triangles. Trace and color the shapes on the sorting mat.

Share and Show

DIRECTIONS 1. Mark an X on all of the triangles.
Question 1.

DIRECTIONS 2. Color the triangles in the picture.
Question 2.

Problem Solving • Applications

DIRECTIONS 3. Anita put her shapes in a row. Which shapes are triangles? Mark an X on those shapes. 4. Draw to show what you know about triangles. Tell a friend about your drawing.
Question 3.

Question 4.

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry

HOME ACTIVITY • Have your child show you an object that is shaped like a triangle.

### Identify and Name Triangles Homework & Practice 9.5

DIRECTIONS 1–2. Color the triangles in the picture.
Question 1.

Question 2.

DIRECTIONS 1. Which shape is a triangle? Color the triangle. 2. Begin with 1 and count forward to 24. What is the next number? Draw a line under that number. 3. How many more counters would you place to model a way to make 10? Draw the counters.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.6 Describe Triangles

Essential Question How can you describe triangles?
Answer: A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry.

Listen and Draw

DIRECTIONS Use your finger to trace around the triangle. Talk about the number of sides and the number of vertices. Draw an arrow pointing to another vertex. Trace around the sides.

Share and Show

DIRECTIONS 1. Place a counter on each corner, or vertex. Write how many corners, or vertices. 2. Trace around the sides. Write how many sides.
Question 1.

Question 2.

DIRECTIONS 3. Draw and color a triangle.
Question 3.

### Describe Triangles Homework & Practice 9.6

DIRECTIONS 1. Draw and color a triangle. 2. Place a counter on each corner, or vertex, of the triangle that you drew. Write how many corners, or vertices. 3. Trace around the sides of the triangle that you drew. Write how many sides.
Question 1.

Question 2.

Question 3.

DIRECTIONS 1. How many sides does the triangle have? Write the number. 2. Which number shows how many kittens are left? Write the number. 3. How many more counters would you place to model a way to make 7? Draw the counters.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Identify and Describe Two-Dimensional Shapes Mid-Chapter Checkpoint

Concepts and Skills

DIRECTIONS 1–2. Trace around each side. Write how many sides. Place a counter on each corner or vertex. Write how many vertices. (K.G.B.4) 3. Draw lines to match the shape to its name. (K.G.A.2)
Question 1.

Question 2.

Question 3.
THINK SMARTER

### Lesson 9.7 Identify and Name Rectangles

Essential Question How can you identify and name rectangles?

Listen and Draw

DIRECTIONS Place two-dimensional shapes on the page. Identify and name the rectangles. Sort the shapes by rectangles and not rectangles. Trace and color the shapes on the sorting mat.

Share and Show

DIRECTIONS 1. Mark an X on all of the rectangles.
Question 1.

DIRECTIONS 2. Color the rectangles in the picture.
Question 2.

Problem Solving • Applications

DIRECTIONS 3. Max looked at his shapes. Which of his shapes are rectangles? Mark an X on those shapes. 4. Draw to show what you know about rectangles. Tell a friend about your drawing.
Question 3.

Question 4.
Answer: A rectangle is a  quadrilateral, which means that it has four sides and four angles.In which two adjacent sides have equal length

HOME ACTIVITY • Have your child show you an object that is shaped like a rectangle.

### Identify and Name Rectangles Homework & Practice 9.7

DIRECTIONS 1. Color the rectangles in the picture.
Question 1.

DIRECTIONS 1. Which shape is a rectangle? Color the rectangle. 2. Count by tens as you point to the numbers in the shaded boxes. Start with the number 10. What number do you end with? Draw a line under that number. 3. How many more counters would you place to model a way to make 6? Draw the counters.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.8 Describe Rectangles

Essential Question How can you describe rectangles?

Listen and Draw

DIRECTIONS Use your finger to trace around the rectangle. Talk about the number of sides and the number of vertices. Draw an arrow pointing to another vertex. Trace around the sides.

Share and Show

DIRECTIONS 1. Place a counter on each corner, or vertex. Write how many corners, or vertices. 2. Trace around the sides. Write how many sides.
Question 1.

Question 2.

DIRECTIONS 3. Draw and color a rectangle.
Question 3.

Problem Solving • Applications

DIRECTIONS 4. I have 4 sides and 4 vertices. What shape am I? Draw the shape. Tell a friend the name of the shape.
Question 4.

HOME ACTIVITY • Have your child describe a rectangle.

### Describe Rectangles Homework & Practice 9.8

DIRECTIONS 1. Draw and color a rectangle. 2. Place a counter on each corner, or vertex, of the rectangle that you drew. Write how many corners, or vertices. 3. Trace around the sides of the rectangle that you drew. Write how many sides.
Question 1.

Question 2.

Question 3.

DIRECTIONS 1. How many sides does the rectangle have? Write the number. 2. Complete the addition sentence to show the numbers that match the cube train. 3. Draw a set that has a number of cubes two greater than 18. Write the number.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.9 Identify and Name Hexagons

Essential Question How can you identify and name hexagons?

Listen and Draw

DIRECTIONS Place two-dimensional shapes on the page. Identify and name the hexagons. Sort the shapes by hexagons and not hexagons. Trace and color the shapes on the sorting mat.

Share and Show

DIRECTIONS 1. Mark an X on all of the hexagons.
Question 1.

DIRECTIONS 2. Color the hexagons in the picture.
Question 2.

Problem Solving • Applications

DIRECTIONS 3. Ryan is looking at his shapes. Which of his shapes are hexagons? Mark an X on those shapes. 4. Draw to show what you know about hexagons. Tell a friend about your drawing.
Question 3.

Question 4.

HOME ACTIVITY • Draw some shapes on a page. Include several hexagons. Have your child circle the hexagons.

### Identify and Name Hexagons Homework & Practice 9.9

DIRECTIONS 1. Color the hexagons in the picture.
Question 1.

DIRECTIONS 1. Which shape is a hexagon? Color the hexagon. 2. Begin with 81 and count forward to 90. What is the next number? Draw a line under that number. 3. What numbers show the sets that are put together? Write the numbers and trace the symbol.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.10 Describe Hexagons

Essential Question How can you describe hexagons?

Listen and Draw

DIRECTIONS Use your finger to trace around the hexagon. Talk about the number of sides and the number of vertices. Draw an arrow pointing to another vertex. Trace around the sides.

Share and Show

DIRECTIONS 1. Place a counter on each corner, or vertex. Write how many corners, or vertices. 2. Trace around the sides. Write how many sides.
Question 1.

Question 2.

DIRECTIONS 3. Draw and color a hexagon.
Question 3.

Problem Solving • Applications

DIRECTIONS 4. I have 6 sides and 6 vertices. What shape am I? Draw the shape. Tell a friend the name of the shape.
Question 4.

HOME ACTIVITY • Have your child describe a hexagon.

### Describe Hexagons Homework & Practice 9.10

DIRECTIONS 1. Draw and color a hexagon. 2. Place a counter on each corner, or vertex, of the hexagon that you drew. Write how many corners, or vertices. 3. Trace around the sides of the hexagon that you drew. Write how many sides.
Question 1.

Question 2.

Question 3.

DIRECTIONS 1. How many sides does the hexagon have? Write the number. 2. Complete the addition sentence to show the numbers that match the cube train. 3. Compare the numbers. Circle the number that is greater.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Lesson 9.11 Algebra • Compare Two- Dimensional Shapes

Essential Question How can you use the words alike and different to compare two-dimensional shapes?

Listen and Draw

DIRECTIONS Look at the worms and the shapes. Use the words alike and different to compare the shapes. Use green to color the shapes with four vertices and four sides. Use blue to color the shapes with curves. Use red to color the shapes with three vertices and three sides.

Share and Show

DIRECTIONS 1. Place two-dimensional shapes on the page. Sort the shapes by the number of vertices. Draw the shapes on the sorting mat. Use the words alike and different to tell how you sorted the shapes.
Question 1.

Answer:S hapes whichconsist of 3 vertices are sorted

DIRECTIONS 2. Place two-dimensional shapes on the page. Sort the shapes by the number of sides. Draw the shapes on the sorting mat. Use the words alike and different to tell how you sorted the shapes.
Question 2.

Answer: 3 sided shapes which are alike are sorted

### Problem Solving • Applications

DIRECTIONS 3. I have a curve. What shape am I? Draw the shape. 4. Draw to show shapes sorted by curves and no curves.
Question 3.

Question 4.

HOME ACTIVITY • Describe a shape and ask your child to name the shape that you are describing.

### Algebra • Compare Two- Dimensional Shapes Homework & Practice 9.11

DIRECTIONS 1. Place two-dimensional shapes on the page. Sort the shapes by the number of sides. Draw the shapes on the sorting mat. Use the words alike and different to tell how you sorted the shapes.
Question 1.

Answer: Triangle has 3 sides. Triangle which are alike are sorted

DIRECTIONS 1. Look at the shape. Draw a shape that is alike in some way. Tell how the two shapes are alike. 2. Count and tell how many. Write the number. 3. How many of each color counter? Write the numbers.
Lesson Check
Question 1.

Answer: Both the shapes 4 vertices and 4 sides and bohe the shapers are quadrilateral with equal length and breath.

Spiral Review
Question 2.

Question 3.

### Lesson 9.12 Problem Solving • Draw to Join Shapes

Essential Question How can you solve problems using the strategy draw a picture?

Unlock the Problem

DIRECTIONS How can you join triangles to make the shapes? Draw and color the triangles.

Try Another Problem

DIRECTIONS 1. How can you join the two triangles to make a rectangle? Trace around the triangles to draw the rectangle. 2. How can you join the two triangles to make a larger triangle? Use the triangle shapes to draw a larger triangle.
Question 1.

Question 2.

Share and Show

DIRECTIONS 3. How can you join some of the squares to make a larger square? Use the square shapes to draw a larger square. 4. How can you join some or all of the squares to make a rectangle? Use the square shapes to draw a rectangle.
Question 3.

Question 4.

DIRECTIONS 5. Can you join these shapes to make a hexagon? Use the shapes to draw a hexagon. 6. Which shapes could you join to make the larger shape? Draw and color to show the shapes you used.
Question 5.

Question 6.

HOME ACTIVITY • Have your child join shapes to form a larger shape, and then tell you about the shape.

### Problem Solving • Draw to Join Shapes Homework & Practice 9.12

DIRECTIONS 1. Place triangles on the page as shown. How can you join all of the triangles to make a hexagon? Trace around the triangles to draw the hexagon. 2. How can you join some of the triangles to make a larger triangle? Trace around the triangles to draw the larger triangle.
Question 1.

Question 2.

DIRECTIONS 1. Join two triangles to make the shape. Draw and color the triangles you used. 2. Count and tell how many. Write the number. 3. Count and tell how many in each set. Write the numbers. Compare the numbers. Circle the number that is less.
Lesson Check
Question 1.

Spiral Review
Question 2.

Question 3.

### Identify and Describe Two-Dimensional Shapes Review/Test

DIRECTIONS 1. Is the shape a circle? Choose Yes or No. 2. Mark under all the shapes that have curves. 3. How many squares are in the picture? Write the number.
Question 1.

Question 2.

Question 3.

DIRECTIONS 4. Look at the square. Write the number of sides on a square. 5. Mark under all of the shapes that are triangles. 6. Mark an X on each shape that has 3 sides and 3 vertices.
Question 4.

Question 5.

Question 6.
THINK SMARTER+

DIRECTIONS 7. Mark an X on the shape that is not a rectangle. 8. Draw a shape that is the same as the boxcars on the train. 9. Mark an X on all of the hexagons.
Question 7.

Question 8.
THINK SMARTER+

Question 9.

DIRECTIONS 10. Match the shape to the number with that many sides. 11. Look at the shapes. Compare them to see how they are alike and how they are different. Use red to color the shapes with four sides. Use green to color the shapes with curves. Use blue to color the shapes with three vertices. 12. Draw the two shapes used to make the arrow.
Question 10.