Question

The surface area of a triangular pyramid is 240 square centimeters. Use the net below to find the length of one edge of the triangular pyramid, represented by L.

Answer 1

The length of one edge of the triangular pyramid is 6 cm

How to determine the length L?

The area is given as:

Area = 240 square centimeters

The net of the triangular pyramid consists of:

• 4 triangles
• Each triangle has the same base (L) and height (10)

So, the area of the net is:

Area = 4 * Base * Height

This gives

240 = 4 * L * 10

Divide both sides by 40

L = 6

Hence, the length of one edge of the triangular pyramid is 6 cm

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