Areas: Polygons and Circles Test

Name___________________________________

Date________________________

Answer the following questions:

Use = 3.14

1. 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

2. What is the area of a square with one side 4 cm? (click for answer)

   16 cm²

3. What is the area of a rectangle with length 6 cm and height 8 cm? (click for answer)

   48 cm²

4. What is the area of a parallelogram with length 6 cm and height 2 cm? (click for answer)

   12 cm²

5. What is the area of a circle with diameter 6 cm? (click for answer)

   28.26 cm²