jessibaby jessibaby

03-06-2016
Mathematics

Answered

A regular square pyramid has a base length of 6 cm. The slant height of the pyramid is 9 cm. What is the surface area of the regular pyramid?

A90 cm2
B120 cm2
C144 cm2
D252 cm2

Verified Answer :

whiskeyo whiskeyo

03-06-2016

l = 6 cm
h = 9 cm
A = l×l + 4×1/2×l×h = 6×6 + 2×6×9 = 36 + 108 = 144 sq cm

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