Question

1. determine the circumference and area of the circle.
2. determine the area of a triangle with a base of 2 ft and a height of 12 ft.

Explanation:

Step1: Calculate the circumference

The formula for the circumference of a circle is \(C = 2\pi r\). Given \(r = 4\) cm.
\(C=2\times\pi\times4 = 8\pi\approx8\times3.14 = 25.12\) cm

Step2: Calculate the area

The formula for the area of a circle is \(A=\pi r^{2}\). Given \(r = 4\) cm.
\(A=\pi\times4^{2}=16\pi\approx16\times3.14 = 50.24\) cm²

Answer:

Circumference: \(25.12\) cm, Area: \(50.24\) cm²