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1.) In triangle ABC, the measure of A is 70°. Angle B is congruent to angle C. What is the measure of angle B in degrees.

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In a triangle, the three interior angles always add to 180°

m∠B = (180-70)/2 = 55°
User Graciela
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You can find the answer by taking 180 and subtracting 70 from it. Then divide that answer by two.

180-70=110.
110/2=55

Angle B is 55 degrees. Since Angle B and Angle C are congruent, Angle C is also 55.
User Samone
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