# Lesson 9 Measure to Find the Area

Let’s measure the sides of rectangles and find the area.

## Warm-up Notice and Wonder: Groups and Arrays

What do you notice? What do you wonder?

## Activity 1 Measure to Find Area

Use a ruler to measure the rectangles. Then, calculate the area of the rectangles in square centimeters.

## Activity 2 Create a Rectangle

Your teacher will give you some tape. Use it to create a rectangle with your assigned area.

Area 1: 4 square feet

Area 2: 6 square feet

Area 3: 9 square feet

Area 4: 10 square feet

Area 5: 12 square feet

Area 6: 16 square feet

## Practice Problem

## Problem 1

Use your ruler to find the area of the rectangle in square centimeters.

Use your ruler to draw a rectangle whose area is 18 square centimeters.