Area of a Circle Given Circumference

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

area

pi

diameter

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

pi

diameter

area

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

area

pi

diameter

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

area

pi

diameter

Mathematical Equivalence

ON

Tags

CCSS.7.G.B.4

Tags

CCSS.7.G.B.4

A circle has a circumference of 62.8 cm. What is its radius?

• 10 cm

• 20 cm

• 5 cm

• 15 cm

Tags

CCSS.7.G.B.4

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

area

diameter

pi

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

area

pi

diameter

Answer explanation

You need to take the diameter (the number next to the pi) and divide it by 2 to get the radius.  You then plug it into the area formula:  A =  $\pi r^2$  

Tags

circles

circumference

pi

diameter

area