Beginners Geometry

Find the area of the circle

• 56.52

• 254.34

• 1017.36

• 113.04

Mr. Hubbs bought a new home and wanted to place new grass on his lawn around his house. What is the area of the shaded area shown, his lawn?

• 13,600 ft²

• 18,400 ft²

• 16,000 ft²

• 2,400 ft²

What is the circumference?

• 50.24

• 96

• 24

• 16

What is the radius?

• 18

• 72

• 38

• 14

A bicycle tire has a diameter of 27 inches. What is the radius?

• 27π

• 13.5

• 81

• 25π

What is the diameter?

• 5 in

• 10 in

• 3.14 in

• 15.84 in

The perimeter of a circle is usually called the...

• radius

• diameter

• circumference

• area

If you multiply π × r × r  then you will get the...

• radius

• diameter

• circumference

• area

If you multiply π × d then you will get the...

• radius

• diameter

• circumference

• area

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm