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Question: Find the lateral area of the square pyramid.



A ) 286 in.2
B ) 427 in.2
C ) 207 in.2
D ) 457 in.2

Steps to derive

1 From the figure, side of a square is 11 in.

2 Area of the lateral face = 12× base × height
 [Lateral face is a triangle with base 11 in. and height 13 in.]
2 = 12 × 11 × 13 = 71.5 in.2

3 Lateral area of the square pyramid = 4 × area of lateral face

 [Substitute the value.]
4 = 4 × 71.5

 [Multiply.]
5 = 286

6 The lateral area of the square pyramid is 286 in.2.



Hence the right answer is Option A

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