Surface Area of an Octagonal Prism

In this video you will learn step by step directions for finding the surface area of an octagonal prism.

Video Guide

0:46 Introduction to finding the surface area
1:04 How to find the base area of the octagonal prism
1:16 How to find the apothem.
2:26 Use trig to find the lateral area.
4:10 Insert the apothem length into the base area formula
5:11 Find the lateral area by using ( perimeter times height )
6:13 Add the base area and the lateral area for the total surface area.

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