How to find a circumference of a circle with radius

Asked by admin @ 05/11/2021 in Mathematics viewed by 257 People

Find the circumference and area of a circle with a radius 9 cm.

Answered by admin @ 05/11/2021

Answer:

C =56.52 cm

A =254.34 cm^2

Step-by-step explanation:

To find the circumference of a circle, we use

C = 2 * pi *r

where pi is approximated by 3.14 and r is 9

C = 2 * 3.14 *9

C =56.52 cm

To find the area of a circle, we use

A = pi *r^2

where pi is approximated by 3.14 and r is 9

A = 3.14 *9^2

A =254.34 cm^2

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