GEOMETRY (SA oftriangular pyramid)
posted by Lloini .
Find the surface area of a triangular pyramid with b =4 cm, h= 8.2 cm and s = 7 cm. PLEASE. How ?
Lateral surface area
=perimeter of base * apothem /2
(for a regular pyramid with a triangular base)
Area of triangular base with side b
What is apothem ?
why did you not include the height ?