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Areas: Polygons and Circles Test

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Date________________________

Answer the following questions:

Use = 3.14

Referring to the above figure, where the larger circle a has a radius of 6 cm and circle B has a radius of 2 cm, find the area of the shaded portion: (click for answer)
100.48 cm²

Area of circle A = r²
Area of circle A = 3.14 (6²)
Area of circle A = 3.14 x 36
Area of circle A = 113.04 cm²

Area of circle B = r²
Area of circle B = 3.14 (2²)
Area of circle B = 3.14 x 4
Area of circle B = 12.56 cm²

Therefore,
Area of the shaded region = Area of Circle A – area of Circle B
Area of the shaded region = 113.04 cm² - 12.56 cm²
Area of the shaded region = 100.48 cm²
What is the area of a square with one side 4 cm? (click for answer)
16 cm²
What is the area of a rectangle with length 6 cm and height 8 cm? (click for answer)
48 cm²
What is the area of a parallelogram with length 6 cm and height 2 cm? (click for answer)
12 cm²
What is the area of a circle with diameter 6 cm? (click for answer)
28.26 cm²

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