math
posted by Jeric on .
A regular hexagonal pyramid whose base perimeter is 60cm has an altitude of 30cm. The volume of the pyramid is??

The volume of any "pointy thing" is
(1/3) base x height
our base is a hexagon where each side is 60/6 or 10 cm
of course we have 6 equilateral triangles
the area of one of these is
(1/2)(10)(10)sin60° = 50√3/2 = 25√3
and we have 6 of them, so the area of the base is
150√3
Volume = (1/3)(150√3)(30) = 1500√3 cm^3