Question

what is the approximate area of the circle, in square centimeters? use 3.14 for π.
20 cm
answer
10

Explanation:

Step1: Find the radius

The diameter of the circle is 20 cm, so the radius \( r=\frac{20}{2} = 10 \) cm.

Step2: Calculate the area

The formula for the area of a circle is \( A=\pi r^{2} \). Substitute \( \pi = 3.14 \) and \( r = 10 \) into the formula: \( A=3.14\times10^{2}=3.14\times100 = 314 \) square centimeters.

Answer:

314