Question

The figure below is a net for a triangular pyramid.

Answer 1

Given, a net for a triangular pyramid.

The triangular pyramid consists of 4 equilateral triangle

As shown, the base of one triangle = 6 cm

The height of one triangle = 5.2 cm

The area of one triangle =

$\frac{1}{2}\cdot6\cdot5.2=15.6\operatorname{cm}^2$

So, the surface area = 4 times the area of one triangle

$=4\cdot15.6=62.4\operatorname{cm}^2$

so, the answer will be Surface area = 62.4 square cm.