If D = 20 cm, calculate the area of circle?.
Solution:
Since r is half the diameter, r = 20 divided by 2
r = 10 cm
A = $\pi$ × r2 = 3.14 × 102 = 3.14 × 100 = 314 cm2
Since r is half the diameter, r = 20 divided by 2
r = 10 cm
A = $\pi$ × r2 = 3.14 × 102 = 3.14 × 100 = 314 cm2