Asked by katy

Regular triangular pyramid has the slant height k=12 cm and lateral area AL = 198 cm2. Find the length of the base edge.

Answered by DrBob222
http://mathworld.wolfram.com/TriangularPyramid.html
Answered by katy
that makes no sense
Answered by Steve
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
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