Question

An octahedron and its net are shown below. All the faces are the same size and shape. What

is the surface area of the octahedron?
1,152 cm2
10.4 cm
576 cm2
A
499.2 cm?
12 cm
998.4 cm2
12 cm
12 cm

Answer 1

499.2 cm²

Explanation:

First, find the area of a triangle.

A = 1/2bh

A = 1/2(12)(10.4)

A = 62.4

Then, take that answer and multiply it by the number of faces. In this problem, there are 8.

62.4 × 8 = 499.2