Chapter 9.CR, Problem 1CR

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Chapter
Section

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

# Each side of the base of a right octagonal prism is 7 in. long. The altitude of the prism measures 12 in. Find the lateral area.

To determine

To find:

The lateral area of the right octagonal prism.

Explanation

Given:

Each side of the base of a right octagonal prism is 7 in. long. The altitude of the prism measures 12 in.

Formula used:

Lateral area L of any prism whose altitude has measure h and whose base has perimeter p is given by the formula,

L=ph

Calculation:

Let L=ph(1)

In this problem, we first find the perimeter of the right octagonal prism.

Right octagonal prism has an eight faces as shown in the above figure

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