Question

find the surface area of the triangular pyramid. now find the total area. area of one side: 18 cm² total area (all 4 sides): ? cm²

Explanation:

Step1: Analyze the number of sides

A triangular pyramid has 4 triangular sides.

Step2: Calculate the total surface area

Since the area of one side is \(18\mathrm{cm}^2\), and there are 4 sides. The total surface area \(S\) is \(S = 4\times18\).

Answer:

\(72\mathrm{cm}^2\)