Surface Area of an Octagonal Prism

Wednesday, June 22, 2016
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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