This handy Math in Focus Grade 2 Workbook Answer Key Chapter 19 Shapes and Patterns detailed solutions for the textbook questions.

## Math in Focus Grade 2 Chapter 19 Answer Key Shapes and Patterns

**Math Journal**

This pattern is made with plane shapes. Circle the mistake in the pattern. Name the correct shape. Then draw the repeating pattern unit.

The correct solid shape is a ___________.

Answer:

Explanation:

I drew a circle around the shape that is mistake in the pattern

I drew the repeating pattern unit

The correct solid shape is a trapezium.

This pattern is made with plane shapes. Circle the mistake in the pattern. Name the correct shape. Then draw the repeating unit.

The correct solid shape is a ___________.

Answer:

Explanation:

I drew a circle around the shape that is mistake in the pattern

I drew the repeating pattern unit

The correct solid shape is a rectangular prism.

**Put On Your Thinking Cap!**

**Challenging practice**

**Use plane shapes to make a pattern**

Question 1.

using shapes of different types.

Answer:

Explanation:

I made a pattern using a circle, rectangle and a hexagon

I repeated the group of 3 shapes 3 times.

Question 2.

using the same shape of different colors.

Answer:

Explanation:

I made a pattern using red and yellow squares

I repeated the each colored square alternatively for 3 times.

Question 3.

by turning the shape.

Answer:

Explanation:

I made a patter using rectangle

I turned the shape to create the pattern

I repeated the group of shapes 3 times.

**Chapter Review/Test**

**Vocabulary**

**Fill in the blanks with words from the box.**

hexagon

trapezoid

pattern

turning

Question 1.

You can form a repeating __________ using different shapes, colors, sizes, and by __________ the shapes.

Answer:

You can form a repeating pattern using different shapes, colors, sizes, and by turning the shapes.

Question 2.

A __________ has six sides.

Answer:

A hexagon has six sides.

Question 3.

A __________ is four-sided like the square and the rectangle.

Answer:

A trapezoid is four-Sided like the square and the rectangle.

**Concepts and Skills**

**Match the shape to its name.**

Question 4.

Answer:

b. cylinder

Explanation:

The above shape is a cylinder

It has a curved face and 2 flat faces.

Question 5.

Answer:

a. pentagon

Explanation:

The above shape is a pentagon

It has 5 sides.

Question 6.

Answer:

d. pyramid

Explanation:

The above shape is a pyramid

It has 5 faces.

Question 7.

Answer:

e. rectangular prism

Explanation:

The above shape is a rectangular prism

It has 6 faces.

Question 8.

Answer:

c. hexagon

Explanation:

The above given shape is a hexagon

It has six sides.

Question 9.

Answer:

f. trapezoid

Explanation:

The above shape is a trapezoid

It has 2 parallel side.

a. pentagon

b. cylinder

c. hexagon

d. pyramid

e. rectangular prism

f. trapezoid

**Use this shape to make another bigger shape. Write how many of this shape you used. Name the shape you made.**

Question 10.

Answer:

Explanation:

I used triangle and created another bigger shape

I used 6 triangles to make the bigger shape

I made a hexagon.

**Draw lines to separate this rectangle into several copies of the same smaller shape.**

Question 11.

Answer:

Explanation:

I drew some lines to separate this rectangles into several copies of the same smaller shape

I made 8 smaller rectangles by drawing 4 lines.

**Copy the shape onto the dot grid. Circle one of the angles of the shape.**

Question 12.

Answer:

Explanation:

I copied the above given shape in the dot grid in the right

I drew a circle around 1 of the angles of the shape

I drew a circle on the right angle.

**Write the number of plane shapes that make up this figure.**

Question 13.

Answer:

Explanation:

3 plane shapes make up this figure

2 rectangles and 1 triangle make the shape in the picture.

**Write the number of solid shapes that make up this model.**

Question 14.

Answer:

Explanation:

12 plane shapes make up this figure

They are 6 cubes, 2 rectangular prisms, 2 cones, 1 sphere and 1 cylinder.

**Draw the next figure in each pattern.**

Question 15.

Answer:

Explanation:

Shape pattern occur when a group of shapes are repeated again and again

The above pattern is made of triangles and rectangles of different sizes

I drew a big triangle to complete the patter.

Question 16.

Answer:

Explanation:

Shape pattern occur when a group of shapes are repeated again and again

There are some circles with change in direction that make the pattern

I drew the next shape to complete the pattern.

**Complete the pattern. Circle the correct solid or model.**

Question 17.

Answer:

Explanation:

Shape pattern occur when a group of shapes are repeated again and again

I drew a circle for the correct shape among the 2 shapes that complete the pattern.

Question 18.

Answer:

Explanation:

Shape pattern occur when a group of shapes are repeated again and again

I drew a circle for the correct shape among the 2 shapes that complete the pattern.

**Problem Solving**

**Look at the pattern. Draw what comes next.**

Question 19.

Answer:

Explanation:

The above pattern is an increasing pattern

I drew 4 triangles together to show the next shape in the pattern.

Question 20.

Susan wants to make a hexagon using the least number of one shape.

a. Which can she use?

Answer:

Explanation:

Susan wants to make a hexagon using the least number of one shape

He can make a hexagon with trapezoids and with triangles

The least number of shapes he can use is using trapezoids.

b. How many of this shape will she use?

Answer:

She will use 2 trapezoids to make a hexagon.