Question

find the circumference and area of the circle. each unit on the graph measures 1 centimeter. round to the nearest tenth, if necessary.

c =
cm
a =
cm²

Explanation:

Step1: Find the radius

From the graph, the radius \( r = 4\) cm.

Step2: Calculate the circumference

The formula for the circumference of a circle is \( C = 2\pi r\). Substitute \( r = 4\) into the formula:
\( C = 2\times\pi\times4=8\pi\approx8\times3.14 = 25.1\) cm.

Step3: Calculate the area

The formula for the area of a circle is \( A=\pi r^{2}\). Substitute \( r = 4\) into the formula:
\( A=\pi\times4^{2}=16\pi\approx16\times3.14 = 50.2\) \(cm^{2}\).

Answer:

\(C = 25.1\) cm, \(A = 50.2\) \(cm^{2}\)