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
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.