number 7 I can not figure out for anything. I keep getting the answer of 103.1 but the back of the book says its 88.1 ft squared
. can someone show me how to get this answer? please...
1 answer:
You have a semicircle attached to a trapezium
Area of semicircle = 1/2 Pi r^2 = 1/2 + pi * 4^2 = 25.13 ( note r = 1/2 * 8 = 4)
Area of the trapezium = h/2 ( sum of 2 parallel sides) = 1/2 * 6 * (13 + 8)
= 63
Total area = 63 + 25.13 = 88.1 to nearest tenth
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