SOLUTION: Vertex angle A of isosceles triangle ABC measures 20 more than three times m<B. Find the measure of all three angles

SOLUTION: Vertex angle A of isosceles triangle ABC measures 20 more than three times m<B. Find the measure of all three angles

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Question 135092: Vertex angle A of isosceles triangle ABC measures 20 more than three times m
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
Sum of the angles in a triangle is 180.
Base angles of isosceles triangles are equal. They equal m
The vertex angle =
So

116 = vertex angle
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