Question

circle o has a circumference of approximately 28.3 cm. what is the approximate length of the radius, r? 4.5 cm 14.2 cm 9.0 cm 28.3 cm

Explanation:

Step1: Recall the circumference formula

The formula for the circumference of a circle is \(C = 2\pi r\), where \(C\) is the circumference and \(r\) is the radius.

Step2: Solve for \(r\)

Given \(C\approx28.3\) cm and taking \(\pi\approx3.14\). Rearrange the formula to \(r=\frac{C}{2\pi}\). Substitute \(C = 28.3\) and \(\pi = 3.14\) into the formula: \(r=\frac{28.3}{2\times3.14}=\frac{28.3}{6.28}\approx4.5\) cm.

Answer:

\(4.5\) cm