What is the exact surface area of the following square pyramid?

asked Jul 8, 2021 214k views

3 votes

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1 vote

Answer:

648√(2) unit^2

Explanation:

$18^2+2\cdot 18\cdot \sqrt{(18^2)/(4)+9^2}\\=2\cdot \:18\sqrt{(18^2)/(4)+9^2}=324√(2)\\=18^2+324√(2)\\=324+324√(2)\\=648√(2)$

Cameron E answered Jul 13, 2021

4.1k points

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