area
51: 147.5
52: 108
53: 78.80
Sorry Im having trouble finding the perimeter but Hope i helped with the area =)
Answer:
the answer is the second one 480ft^3
The perimeter = 4 * length of a semicircle of radius 5 == 4* pi * 5 = 20 pi cm
The area of one of the clear parts = 1/2 area of square - area semicircle
= 1/2 * 10^2 - 1/2 pi *5^2 = 50 - 12.5pi
So area of shaded parts = area of square - 4 (50 - 12.5pi)
= 100 - 200 + 100pi = (100pi - 100) cm^2
Answer:
7 + 100 + 1 +3 +7 +10 + 15 + 12 +17 + 38
= 210
