Question

Find the circumference of a circle that has an area of 153.86 cm.

Answer 1

C=
`14\pi` or ≈43.96cm

Explanation:

Start by figuring out the Area of the circle to get the radius (r)

Area (A)=153.86 cm

A=
`\pi r`²

153.86=
`\pi`r²

153.86÷
`\pi`=r²

49=r²

√49= r

r= 7cm

Next insert r=7cm into the Circumference equation of a circle

C=2
`\pi`r

C= 2×
`\pi`×7

C=14
`\pi` or C=43.96cm