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Parts of a Circle and Area

Total questions: 9

Worksheet time: 9mins

Name
Class
Date
1.

What is AB?

a)

diameter

b)

center

c)

circumference

d)

radius

2.

Name the part shown in the given circle.

a)

Sector

b)

Chord

c)

Segment

d)

Circumference

3.

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

a)

Radius

b)

Diameter

4.

What is π ? (Best Choice)

a)

The ratio of the circumference of any circle to its diameter.

b)

Exactly 3.14

c)

Exactly 3.1415

d)

Exactly 3.141593

5.

If my radius is 10ft, what is my diameter?

a)

20ft

b)

5ft

c)

31.4ft

d)

62.8ft

6.

A Circle has a radius of 4.  What is the area of the circle? (Best Choice) (note: units are squared)

a)

4π or about 12.56

b)

16π or about 50.24

c)

2π or about 6.28

d)

8π or about 25.12

7.

What is the area of the circle? (Best Choice)

a)

5π or about 15.7 cm2

b)

10π or about 31.4 cm2

c)

25π or about 78.5 cm2

d)

100π or about 314 cm2 

8.

What is the diameter?

a)

8

b)

16

c)

10

d)

4

9.

Other than the formula C=πd what is another formula for circumference of a circle?

a)

C=2π

b)

C=2πr

c)

C=πr²

d)

C=πd²