Find the surface area of each regular pyramid. round to the nearest tenth if necessary.

if you notice the triangle on the left-hand-side, it has a base of 8 ft and a height/altitude of 10.

now, the triangular pyramid has 3 of those triangles standing up, and one at the base lying down, so 4 triangles with that base and altitude. So we can simply find the area of all 4 of those triangles, sum them up and that's the area of the triangular pyramid.

x = 25/2304

step-by-step explanation:

answer: 72: 111

step-by-step explanation: