Embed Size (px)
Citation preview
Name:
Super Teacher Worksheets - www.superteacherworksheets.com
Area of a Circle
Find the area of each circle. Use 3.14 for pi.
To find the area of a circle, use the formula pi x radius2 = area.This formula is often written as A = πr2 .
The circle pictured here has a radius of 5 cm.r = 5 cmπ = 3.14A = 3.14 x (5 cm x 5 cm)A = 3.14 x 25 cm2
A = 78.50 cm2
5 cm
12 cm
a. b. 3 mc.
6 km
d.
7 in.e.
9 mm
f.
10 m
i
g. Kaylee and Rory have a circular swimming pool. The pool has a cover that fits snuggly over the top of it. If the radius of the pool is 11 ft, what is the surface area of the cover?
Super Teacher Worksheets - www.superteacherworksheets.com
Area of a Circle
Find the area of each circle. Use 3.14 for pi.
To find the area of a circle, use the formula pi x radius2 = area.This formula is often written as A = πr2 .
The circle pictured here has a radius of 5 cm.r = 5 cmπ = 3.14A = 3.14 x (5 cm x 5 cm)A = 3.14 x 25 cm2
A = 78.50 cm2
5 cm
12 cm
a. b. 3 mc.
6 km
d.
7 in.e.
9 mm
f.
10 m
i
g. Kaylee and Rory have a circular swimming pool. The pool has a cover that fits snuggly over the top of it. If the radius of the pool is 11 ft, what is the surface area of the cover?
ANSWER KEY
452.16 cm2 28.26 m2 113.04 km2
153.86 in.2 254.34 mm2 314 mi2
3.14 x 121 = 379.94 ft2
Name:
Super Teacher Worksheets - www.superteacherworksheets.com
Area of a Circle
Find the area of each circle. Use 3.14 for pi.
To find the area of a circle, use the formula pi x radius2 = area.This formula is often written as A = πr2 .
The circle pictured here has a radius of 5 cm.r = 5 cmπ = 3.14A = 3.14 x (5 cm x 5 cm)A = 3.14 x 25 cm2
A = 78.50 cm2
5 cm
12 cm
a. b. 3 mc.
6 km
d.
7 in.e.
9 mm
f.
10 m
i
g. Kaylee and Rory have a circular swimming pool. The pool has a cover that fits snuggly over the top of it. If the radius of the pool is 11 ft, what is the surface area of the cover?
Super Teacher Worksheets - www.superteacherworksheets.com
Area of a Circle
Find the area of each circle. Use 3.14 for pi.
To find the area of a circle, use the formula pi x radius2 = area.This formula is often written as A = πr2 .
The circle pictured here has a radius of 5 cm.r = 5 cmπ = 3.14A = 3.14 x (5 cm x 5 cm)A = 3.14 x 25 cm2
A = 78.50 cm2
5 cm
12 cm
a. b. 3 mc.
6 km
d.
7 in.e.
9 mm
f.
10 m
i
g. Kaylee and Rory have a circular swimming pool. The pool has a cover that fits snuggly over the top of it. If the radius of the pool is 11 ft, what is the surface area of the cover?
ANSWER KEY
452.16 cm2 28.26 m2 113.04 km2
153.86 in.2 254.34 mm2 314 mi2
3.14 x 121 = 379.94 ft2
