Question

area of a circle
find the area of a circle with diameter 10 cm.
use the value 3.14 for π, and do not round your answer.
be sure to include the correct unit in your answer.
10 cm

Explanation:

Step1: Calculate radius from diameter

$r = \frac{10}{2} = 5$ cm

Step2: Apply circle area formula

$A = \pi r^2 = 3.14 \times 5^2$

Step3: Compute the final value

$A = 3.14 \times 25 = 78.5$

Answer:

78.5 $\text{cm}^2$