SOLUTION: each base angle of an isosceles triangle has a measure that is 20 more than 3 times the measure of the vertex angle. Find the measure of the vertex angke

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Question 796481: each base angle of an isosceles triangle has a measure that is 20 more than 3 times the measure of the vertex angle. Find the measure of the vertex angke
Answer by stanbon(75887)   (Show Source): You can put this solution on YOUR website!
each base angle of an isosceles triangle has a measure that is 20 more than 3 times the measure of the vertex angle. Find the measure of the vertex angle.
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Let the vertex angle be "x"::
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Each base angle:: 3x+20
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Equation:
2(3x+20) + x = 180
6x + 40 + x = 180
7x = 140
x = 20 degrees (vertex)
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3x+20 = 80 degrees
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Cheers,
Stan H.
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