Question

find the circumference and area of the circle. express answers in terms of π and then round to the nearest tenth. find the circumference in terms of π c = (type an exact answer in terms of π.)

Explanation:

Step1: Formula de la circunferencia

La fórmula para la circunferencia de un círculo es \( C = 2\pi r \), donde \( r \) es el radio.

Step2: Sustituir el valor del radio

Dado que \( r = 9\) cm, sustituimos en la fórmula: \( C = 2\pi\times9\).

Answer:

\( C = 18\pi\)