Answer: 
Step-by-step explanation:
Equilateral triangle has equal sides, let the side be
, then the perimeter is 
Therefore:



To find the altitude , we will apply Pythagoras theorem , that is

Therefore:



take the square root of both sides

Answer:
45in - 10in = 35in
Step-by-step explanation:
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Answer: 16 cm^2.
Step-by-step explanation: The volume of a pyramid is equal to one-third the product of the area of the base and the height:

In this case, the base is a square, so its area is:
A=L^2 where "L" is the lenght of the base edge
So the volume would be:


V=16*3/3

Answer:
no idea
Step-by-step explanation:
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