Area & Circumference of Circles
Name ____________________________
1
Math
Class __________________ Date ____________
What is the circumference of a circle with
a diameter of 8 centimeters?
C=πd
6 What is the area of a circle with
a radius of 12 cm?
A = πr²
12 cm
8 cm
2 What is the circumference of a circle
with a diameter of 9 meters?
7 If the radius of a circle is 4 meters, then
the circumference is ______.
C=πd
C=πd
4m
9m
3 If the diameter of a circle is 25 cm, what is
the circle’s circumference?
8 If r = 3 in., then A =
__________ sq. in.
C=πd
3 in.
A = πr²
25 cm
9 In the equation for calculating the
4 What is the circumference of a circle
with a diameter of 19 inches?
circumference of a circle, the π stands
for 3.14 which is the decimal fraction
for 22/7. True or false?
C=πd
True or false?
19 in.
10 A rancher needs to put a fence around
his circular pasture. The pasture is
50 feet in diameter. How much fencing
does he need?
5 What is the area of a circle
with a radius of 9 ft.?
A = πr²
9 ft.
C=πd
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non-commercial educational purposes only. Visit us at www.newpathworksheets.com
Area & Circumference of Circles - Answer Key
Name ____________________________
1
Class __________________ Date ____________
What is the circumference of a circle with
a diameter of 8 centimeters?
C=πd
8 π = 25.12 cm
Math
6 What is the area of a circle with
a radius of 12 cm?
A = πr²
8 cm
12 cm
π 122 = 452.16 cm2
2 What is the circumference of a circle
with a diameter of 9 meters?
7 If the radius of a circle is 4 meters, then
the circumference is ______.
C=πd
C=πd
d = 2r = 8
9m
9 π = 28.26 m
4m
8 π = 25.12 meters
3 If the diameter of a circle is 25 cm, what is
the circle’s circumference?
C=πd
8 If r = 3 in., then A =
28.26 sq. in.
__________
3 in.
A = πr²
25 cm
25 π = 78.5 cm
9 In the equation for calculating the
4 What is the circumference of a circle
with a diameter of 19 inches?
C=πd
19 π = 43.88 in.
circumference of a circle, the π stands
for 3.14 which is the decimal fraction
for 22/7. True or false?
true
19 in.
True or false?
10 A rancher needs to put a fence around
his circular pasture. The pasture is
50 feet in diameter. How much fencing
does he need?
5 What is the area of a circle
with a radius of 9 ft.?
A = πr²
π 92 = 254.34 ft2
9 ft.
C=πd
50 π = 157 ft.
© Copyright NewPath Learning. All Rights Reserved. Permission is granted for the purchaser to make copies for
non-commercial educational purposes only. Visit us at www.newpathworksheets.com