Question

ructions: solve the following problems on circumference and area of a ci
ress your answers in terms of pi. use appropriate formula in finding circu
area and circumference of cir
calculate the area and circumference of
circumference =
area =

Explanation:

Step1: Recall the formula for circumference

The formula for the circumference \(C\) of a circle is \(C = 2\pi r\). Given \(r = 8.7\) mm, substitute \(r\) into the formula: \(C=2\pi\times8.7\).

Step2: Calculate the circumference

\(C = 17.4\pi\) mm.

Step3: Recall the formula for area

The formula for the area \(A\) of a circle is \(A=\pi r^{2}\). Substitute \(r = 8.7\) mm into the formula: \(A=\pi\times(8.7)^{2}\).

Step4: Calculate the area

\(A=\pi\times75.69 = 75.69\pi\) \(mm^{2}\).

Answer:

Circumference \(=17.4\pi\) mm, Area \(=75.69\pi\) \(mm^{2}\)