Volume Problem

Hockeyman

Junior Member
Joined
Dec 8, 2005
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79
Find the volume of a triangular pyramid whose base is equilateral with each side 6 meters long. The vertex of the pyramid is 3 meters directly over the incenter of the triangle.

Now if the triangle is equilateral then the height must be 3 SqRt 3, therefore the area of the base is 18 SqRt 3 divided by 2 = 9 SqRt 3

Then I am assuming since the incenter of a traingle is the exact center of a triangle and the vertex is directly over it, then the 3 meters must be the height of the pyramid.

So i multiplied the 9 SqRt 3 by 3 = 27 SqRt 3

That is what i got as my volume. Is this correct?
 
almost ...
remember that the volume of a pyramid = (1/3}(base area)(height)
 
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