Determine the measure of the vertex angle, Mathematics

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Determine the measure of the vertex angle of the isosceles triangle.

a. 34°

b. 16°

c. 58°

d. 112°

d. Simply substitute x = 34 into the equation for the vertex angle, 3x + 10. The result is 112°. If you select a, you solved for the base angle. If you select b, the original equation was written incorrectly as x + x + 3x + 10 = 90.


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