7. Measurement

Lesson

Let's review how to find the perimeter and how to find the area of the rectangle.

Find the perimeter of the rectangle shown.

Worked Solution

Find the area of the rectangle shown.

Worked Solution

You may have noticed already that shapes with the same perimeter don't always have the same area, as shown in the rectangles below. Similarly, shapes with the same area don't always have the same perimeter.

This video looks at the relationship between perimeter and area.

Which one of these rectangles has an area of 24\text{ cm}^2 and a perimeter of 28\text{ cm}?

A

B

C

D

Worked Solution

Idea summary

Rectangles can have the same perimeter but different areas.

selects and uses the appropriate unit and device to measure lengths and distances, calculates perimeters, and converts between units of length

selects and uses the appropriate unit to calculate areas, including areas of squares, rectangles and triangles