Question

A dodecagonal pyramid has a surface area of 130 square inches. A similar dodecagonal pyramid has a surface area of 2080 square inches. If the larger pyramid has a height of 32, what is the height of the smaller dodecagonal pyramid?

Answer 1

Answer:

8 in.

Step-by-step explanation:

The ratio of the surface areas is equal to the square of the ratio of the heights

Let h = the height of the smaller dodecagonal pyramid

So,  $\frac{2080}{130} = \frac{32^{2}}{h^{2} }$

$h^{2} = \frac{32^{2} * 130 }{2080}$

$h^{2} = 64$

h = 8 in.