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Home > GC > Chapter 12 > Lesson 12.2.4 > Problem 12-94


Polly has a pentagon with angle measures , , , , and . Find the probability that if one vertex is selected at random, then the measure of its angle is more than or equal to .  

Solve for , which will then allow you to find the value of each angle.

Add together the angles that are , then divide the sum by (the total number of vertices).