Answer:
474 sq. inches
Explanation:
15 x (7+9+11.4) = 411
2x 1/2 x 7 x 9 = 63
= 474
537 in²
11.4 x 15 = 171
2(7 x 9) = 126
7 x 15 = 105
9 x 15 = 135
171 + 126 + 105 + 135 = 537
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