Calculate the area of shapes made from 2 or more rectangles | Exit Quiz | Oak National Academy

A {{ }} shape is one that is made up of two or more shapes.

• rectangle

• rectilinear

• square

• compound

Answer explanation

A compound shape is made up of two or more shapes.

This is an image of the French flag. It consists of three rectangles of equal size. Calculate the area of the blue part. (a)   cm²

Answer explanation

The total area is 189 cm². So, each of the three areas is 63 cm². Well done.

This image is of the flag from the Netherlands. It consists of three rectangles of equal size. Calculate the total area of the flag. (a)   cm²

Answer explanation

One of the parts is equal to 33 cm². So, the total area is 99 cm².

This rectilinear shape is made up of four identical rectangles. Choose an efficient method to calculate the area. A = (a)   cm²

Answer explanation

You correctly calculated the area of the rectilinear shape.

Laura has chosen to decompose this compound rectilinear shape into two rectangles. Which multiplications will she use to help calculate the area?

• 9 cm × 6 cm

• 11 cm × 9 cm

• 11 cm × 3 cm

• 3 cm × 5 cm

Answer explanation

Correct. The area can be calculated using 9 cm × 6 cm and 3 cm × 5 cm.

To calculate an area of the playground, Luca has chosen to calculate the whole area and then subtract the missing part. Correctly order the calculations that he would do.

• 132 m² - 9 m² = 123 m²

• 3 m × 3 m = 9 m²

• 12 m × 11 m = 132 m²

Answer explanation

You correctly ordered the calculations.