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: Obtener el radio

El diámetro \(d = 42\) yd. El radio \(r=\frac{d}{2}=\frac{42}{2} = 21\) yd.

Step2: Usar la fórmula de la circunferencia

La fórmula de la circunferencia de un círculo es \(C = 2\pi r\) o \(C=\pi d\). Usando \(C=\pi d\) (ya que \(d = 42\) yd), entonces \(C = 42\pi\) yd.

Answer:

\(42\pi\)