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Geometry

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Finding the Base Length Given Two Similar Pyramids

GEOM-HPKRBZ

The pentagonal pyramids pictured below are similar.

What is the length of the base edge of the smaller pyramid?

“Mark Czaplewski Created for Albert.io. Copyright 2016. All rights reserved.”

A

$\frac { 54 }{ 7 } $ $cm$

B

$\frac { 9 }{ \sqrt { 3 } } $ $cm$

C

$2 \cdot \sqrt {3} $ $cm$

D

$\frac { 18\sqrt { 3 } }{ 7 } $ $cm$