Question

Serena is making a model of the Egyptian pyramid. The square base has sides that are all 4.6 in. Each of the triangular faces has a base or 4.6 and a height of 4 in. How much paper would it take to cover the entire pyramid

Answer 1

56.96 square inches

Explanation:

The amount of paper is the surface area. To find the surface area, calculate the area of each shape and add it together, A pyramid has 1 square and 4 triangles in its net,

Area of square is A=s*s=4.6*4.6= 21.16

Area of a triangle is A= 1/2 b*h = 1/2 (4.6)(4) = 9.2.

There are four equal triangles so together there area is 4*9.2 = 36.8.

Add the square to it and you have the surface area of the pyramid.

36.8 + 21.16 = 57.96