Question

Find the surface area of the pyramid.

Answer 1

3 * ( 0.5 * 9 * 7.79 ) + area of equilateral triangle with side 9

Answer 2

Answer:

Step-by-step explanation:

Surface area of a triangular pyramid =

Area of 1 triangle face = 1/2 base x perpendicular height= 4.5 x 7.79

Total of 4 faces so total area is 4 x 4.5 x 7.79 =140.22 m2