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Homework Help: GEOMETRY (SA oftriangular pyramid)

Posted by dull on Sunday, July 14, 2013 at 10:26am.

Find the surface area of a triangular pyramid with b =4 cm, h= 8.2 cm and s = 7 cm. PLEASE. How ?
GEOMETRY (SA oftriangular pyramid) - MathMate, Sunday, July 14, 2013 at 8:41am
Lateral surface area
=perimeter of base * apothem /2
=3b*s/2
(for a regular pyramid with a triangular base)

Area of triangular base with side b
=(√3)*b/2*(b/2)
=(√3)bē/4
GEOMETRY (SA oftriangular pyramid) - Anonymous, Sunday, July 14, 2013 at 10:05am
What is apothem ?
GEOMETRY (SA oftriangular pyramid) - Anonymous, Sunday, July 14, 2013 at 10:15am
why did you not include the height ?

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