Free Printable Radius Diameter Circumference Area of Circles

1.

Find the area of this circle. Use 3.14 for pi. Only type the number.

(a)

2.

Name all of the radii

a)

JC, KC, KH, HC

b)

JO, KO, CO, HO

c)

JC, KO, KH, HO

d)

JK, KC, CH, HJ

3.

The radius of a circle is 5 cm. 3x+7 represents the length of the diameter. Write an equation for x.

a)

3x+7=5

b)

3x+7=10

c)

3x+7=7

d)

3x+7=2.5

4.

Find the area of this circle. Use 3.14 for pi. Only type the number.

(a)

5.

If my diameter is 90cm, what is my circumference?

a)

282.6 cm

b)

180 cm

c)

90 cm

d)

565.2 cm

6.

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

a)

20ft

b)

5ft

c)

31.4ft

d)

62.8ft

7.

If my diameter is 19 inches, what is my radius?

a)

38 inches

b)

9.5 inches

c)

59.66 inches

d)

119.32 inches

8.

If my radius is 2 yd what is the circumference?

a)

4 yd

b)

1 yd

c)

12.56 yd

d)

6.28 yd

9.

If my circumference is 50.24ft, what is my radius?

a)

8 ft

b)

16 ft

c)

25.12 ft

d)

50.24 ft

10.

An electric fan has a diameter of 10 inches. Find the area of this fan.

a)

78.5 $in^2$

b)

314 $in^2$

c)

31.4 $in^2$

d)

49.298 $in^2$

11.

If my circumference is 163.28ft, what is my radius?

a)

52 ft

b)

26 ft

c)

3.14 ft

d)

163.28 ft

12.

A pan size pizza has a circumference of 37.68 inches. Find the area the pizza covers.

a)

6 $in^2$

b)

113.04 $in^2$

c)

18.84 $in^2$

d)

59.1576 $in^2$

13.

What is the area of a circle with a radius of 3ft?

a)

$28.26\ ft^{ }$

b)

$28.26\ ft^2$

c)

$28.26\ ft^3$

d)

$28.26\ ft^4$

14.

What is the circumference of a circle with a diameter of 5 in?

a)

15.7 in

b)

$15.7\ in^2$

c)

$15.7\ in^3$

d)

$15.7\ in^4$

15.

If my circumference is 37.68cm, what is my diameter?

a)

12 cm

b)

118.3152 cm

c)

6 cm

d)

37.68 cm

Radius Diameter Circumference Area of Circles

Total questions: 15

Worksheet time: 15mins

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