An angle of 42 degrees is an acute angle because it is greater than 0 but less than 90 degrees
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Since 42 + 48 = 90 the answer is yes.
There are 360 degrees in a circle.
The vertex angle of an isosceles triangle is equal to the measure of each of its base angles. Therefore, if one of the base angles measures 42 degrees, then the vertex angle also measures 42 degrees.
96 degrees
The length of the congruent sides makes no difference to the measured angles. Assuming the base angles are the congruent angles, then: angle = (180o - other_angle) ÷ 2 = (180o - 42o) ÷ 2 = 69o