SOLUTION: Triangle SAB is an isosceles triangle. What is the measure of its vertex angle if the sum of the measures of the base angles is 100?

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Question 162710: Triangle SAB is an isosceles triangle. What is the measure of its vertex angle if the sum of the measures of the base angles is 100?
Answer by Alan3354(69443) About Me  (Show Source):
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The sum of the angles in a triangle is 180º. The 3rd angle has to be 180-100, or 80º.