Question

] http://prntscr.com/3yci1e

Answer 1

So the total surface area which you are given is the area of the square base, plus the area of all four triangular sides. You are told that it is a square pyramid, therefore all four triangular sides (assuming of course that it is a regular pyramid) are equal. that means that:
Surface Area = SA = A_base + 4*A_triangle
You know the total surface area SA and the area of the base (A_base), so now you can simply substitute in the known values and solve the equation for the triangle area.

189cm^2 = 49cm^2 + 4*A_triangle

then subtract 49 from each side:

140cm^2 = 4*A_triangle

then divide each side by 4 to finish solving

A_triangle = 35cm^2

Answer 2

http://openstudy.com/study#/updates/4fbd4850e4b0c25bf8fb94f2

Answer 3

thanks!!!! @LifeEngineer uwu

Answer 4

No worries!