Parts of a Circle

Circles Review

By Taylor Eddings

Circumference

Area

Diameter

Radius

​

Parts of a Circle

Multiple Choice

What is the diameter?

• 8
• 16
• 10
• 4

Multiple Choice

What is the radius?

• 18
• 72
• 38
• 14

Multiple Choice

What is the diameter?

• 5 in
• 10 in
• 3.14 in
• 15.84 in

Multiple Choice

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

​Distance around a circle.

The perimeter of a circle.​

​

Circumference

Multiple Choice

What is the circumference?

• 50.24

• 200.96

• 25.12

• 18

Multiple Choice

What is the circumference of a circle with a diameter of 10 meters?

• 5 meters

• 15.7 meters

• 3.14 meters

• 31.4 meters

Multiple Choice

Daniel wants to buy cookies for her friend. The
radius of a cookie is 5 inches. What is the cookie’s 
circumference?

• 10 in

• 2.5 in

• 15.7 in

• 31.4 in 

Space inside the circle

​

Area

Multiple Choice

What is the area of this circle?

• 163.2

• 15.3

• 124.2

• 113.1

Multiple Choice

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

Multiple Choice

What is the area of this circle?

• 6082.12
• 1520.53
• 1893.14
• 1292.92

In Terms of Pi..

Leave Pi in your answer.

Multiple Choice

A circle has a diameter of 4 cm. What is its circumference?

• 4π cm

• 2π cm

• 8π cm

• 16π cm

Multiple Choice

A circle has a radius of 9 cm. What is its circumference?

• 9π cm

• 18π cm

• 4.5π cm

• 81π cm

Multiple Choice

A circle has a radius of 5 cm. What is its area?

• 50π cm²

• 10π cm²

• 25π cm²

• 5π cm²

Multiple Choice

A circle has an area of 16π in². What is its radius?

• 32 in

• 16 in

• 4 in

• 2 in