Rafael is cutting pieces of wood to make a triangular pyramid like the one shown below. The base of the pyramid is an equilateral triangle, and the faces are isosceles triangles.

Step-by-step explanation:

Given

See attachment for triangle

Required

The surface area of the pyramid

To do this, we calculate the surface area of each of the pyramid faces.

For the equilateral triangle.

The area is:

There are 3 isosceles triangles of equal dimension.

The area of one of them is:

For the 3, the surface area is:

The total surface area is:

a. 19,958,400

step-by-step explanation:

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