Question

A wooden clock is made in the shape of a triangular pyramid. The net of the pyramid is shown. A triangular pyramid. The base has a base of 8 inches and height of 6.9 inches. The 3 sides have a base of 8 inches and height of 7.4 inches. [Not drawn to scale] How much wood is needed to build the clock?

Answer 1

116.4 Square Inches

Explanation:

Base Area of the Triangular Pyramid

`=\frac12 * 8 * 6.9\\\\=27.6$ square inches`

Surface Area of the three sides

`=3 * \frac12 * 8 * 7.4\\\\=88.8$ square inches`

Therefore, the area of wood needed to build the clock

=27.6+88.8

=116.4 Square Inches