The vertex angle of an isosceles triangle measures 42°. A base angle in the triangle has a measure given by
1 answer:
Assuming the base angles are equal, then (2x + 3) + (2x + 3) + 42 = 180 (angles sum in triangle)
4x + 48 = 180
4x = 180 - 48 = 132
x = 132 / 4 = 33
Each base angle measures 2 x 33 + 3 = 69 degrees
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