Answer:
217 mm^2 (mm squared)
Step-by-step explanation:
area of semicircle = 1/2(πr^2) Pi times radius squared, divided by 2
r = d/2 radius equals diameter divided by 2
π = 3.14
r = 20/2 = 10
1/2(3.14 x (10^2))
1/2(3.14 x 100)
1/2(314)
area of semicircle = 157
area of rectangle = lw length times width
20x30
area of rectangle = 600
total area = area of rectangle + area of semicircle
total area = 157 + 600
total area = 757 mm^2
