Regular triangular pyramid has the slant height k=12 cm and lateral area AL = 198 cm2. Find the length of the base edge.
3 answers
http://mathworld.wolfram.com/TriangularPyramid.html
that makes no sense
With a slant height of 12, each triangular face has a base of s and a height of 12, so
3(12s/2) = 198
s = 11
3(12s/2) = 198
s = 11
4 answers