What is the measure of the vertex angle of an isosceles triangle if one of its base angle measures 34° and it’s congruent sides
each measure 15 cm
68
73
112
56
1 answer:
Let the vertex angle be x.
Base angles in the isosceles triangle are congruent.
Let the base angles be α=34°
Total sum of the inner angles in the triangle is 180°.
We can make equation
2α+x=180° => x=180-2α=180-68=112
The measure of the vertex angle is 112°
Good luck!!!
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