To find:
The measure of an interior angle and the measure of an exterior angle for the given regular
Answer to Problem 12.12EP
Each exterior angle of a 9-gon is 40 degrees.
Each interior angle of a 9-gon is 140 degrees.
Explanation of Solution
Given:
A regular ploygon: 9-gon.
Concept used:
Each exterior angle of a regular polygon with n sides is given by formula
Each interior angle of a regular polygon with n sides is given by formula
Calculation:
We know that a 9-gon is a regular polygon with 9sides, so value of n is 9.
Therefore, each exterior angle of a 9-gon is 40 degrees.
Therefore, each interior angle of a 9-gon is 140 degrees.
Chapter CSR Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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