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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

1. Angles of Polygons

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Exercise 21 Page 480

The measure of each interior angle of a regular n -gon is (n-2)180n.

150

Practice makes perfect

Recall the Corollary to the Polygon Interior Angles Sum Theorem.

Corollary to the Polygon Interior Angles Sum Theorem
The measure of each interior angle of a regular n -gon can be found using the expression (n-2)180n.

A dodecagon is a polygon with 12 sides. Therefore, to find the measure of an interior angle of a dodecagon, we have to substitute 12 for n in this expression. ( 12-2)180/12=150

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Exercises p.479-483