Circle - Area and Circumference

1.

Multiple Choice

3 mins

1 pt

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

c = 15π

C = 2π15

c = 15 ÷ π

c = 15 π

2.

Multiple Choice

1 min

1 pt

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

Radius

Diameter

3.

Multiple Choice

3 mins

1 pt

Find the area of the circle

43.96

153.86

87.82

307.72

4.

Multiple Choice

5 mins

1 pt

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

4 in.

8 in.

12 in.

16 in.

5.

Multiple Choice

45 sec

1 pt

The radius is 8 inches. What is the circumference?

50.24 inches

25.12 inches

12.56 inches

200.96 inches

6.

Multiple Choice

30 sec

1 pt

What is circumference?

The distance around a circle.

The space inside the circle.

A line from side to side passing through the center.

A line from the center to the side.

7.

Multiple Choice

30 sec

1 pt

What is the area of a circle?

The distance around a circle.

The space inside the circle.

A line from side to side passing through the center.

A line from the center to the side.

8.

Multiple Choice

10 sec

1 pt

How do you find the radius?

π*2

d/2

π*r

I do not know

9.

Multiple Choice

2 mins

1 pt

A Circle has a radius of 4. What is the circumference of the circle? (Best Choice)

4π or about 12.56

16π or about 50.24

2π or about 6.28

8π or about 25.12

10.

Multiple Choice

2 mins

1 pt

If r = 4, d = ?

4

2

8

8π

11.

Multiple Choice

2 mins

1 pt

What is the diameter of the circle in the image?

10

20π

20

100

12.

Multiple Choice

2 mins

1 pt

What is the formula for finding the area of a circle?

13.

Multiple Choice

3 mins

1 pt

What does π equal?

3

3.14

3.2

21/7

14.

Multiple Choice

3 mins

1 pt

A circle as a circumference of 36π meters. What is the radius of the circle?

36 meters

6 meters

12 meters

18 meters

15.

Multiple Choice

30 sec

1 pt

MUST DO: What is the approximate area of the circle above?

44 inches squared

154 inches squared

616 inches squared

16.

Multiple Choice

3 mins

1 pt

If the radius of a circle is 12.5 meters, the diameter is ____

6.25 meters

125 meters

25 meters

50 meters

17.

Multiple Choice

10 sec

1 pt

What is the radius of this circle?

12cm

6cm

24cm

3cm

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