# Section A: Practice Problems Reason with Shapes

## Section Summary

## Details

In this section, we learned to sort shapes based on attributes such the number of sides, side lengths, and whether angles were right angles. We also sorted quadrilaterals and triangles into more specific groups.

We learned that a shape can be named based on its attributes. For example:

If a triangle has a right angle, then it is a

**right triangle**.

If a quadrilateral has 2 pairs of sides that are the same length and 4 right angles, then it is a rectangle.

If a quadrilateral has sides that are all the same length, then it is a rhombus.

If a quadrilateral has sides that are all the same length and 4 right angles, then it is a square.

## Problem 1 (Pre-Unit)

Which shapes are hexagons?

Draw a quadrilateral and label it Q. Draw a pentagon and label it P.

## Problem 2 (Pre-Unit)

Finish covering the rectangle with equal-sized squares.

Write an addition equation showing how many small squares there are in the rectangle.

Write a multiplication equation showing how many small squares there are in the rectangle.

## Problem 3 (Pre-Unit)

What is the area of the figure?

## Problem 4 (Pre-Unit)

Find the length of each rectangle.

## Problem 5 (Lesson 1)

Which shapes have 5 angles?

Which shapes have all side lengths the same size?

## Problem 6 (Lesson 2)

Which triangles have one right angle?

Which triangles have two sides that are the same length?

## Problem 7 (Lesson 3)

One of these quadrilaterals is Diego’s mystery quadrilateral.

List some questions you would ask to figure out Diego’s mystery quadrilateral. How would the answers help you figure out which quadrilateral it is?

## Problem 8 (Lesson 4)

Select **all** of the quadrilaterals that are rectangles.

## Problem 9 (Lesson 5)

Draw a quadrilateral that is

*not*a rhombus and label it A. Explain why your shape is not a rhombus.

Draw a quadrilateral that is

*not*a rectangle and label it B. Explain why your shape is not a rectangle.

## Problem 10 (Exploration)

Find one of each of the following shapes in the image.

A triangle with a right angle

A triangle with 3 equal sides

A rhombus

A rectangle

A square

## Problem 11 (Exploration)

Do any of the triangles have:

a right angle?

two equal sides?

three equal sides?