Question

the diameter of a circle is 10 ft. find its area in terms of $pi$.

Explanation:

Step1: Find radius from diameter

Radius $r = \frac{\text{diameter}}{2} = \frac{10}{2} = 5$ ft

Step2: Apply circle area formula

Area $A = \pi r^2 = \pi (5)^2$

Answer:

$25\pi$ square feet