Question

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If m∠A=59 and m∠3=81°, what is m∠B? m∠B= _[blank]_°

Answer 1

59° + 81°+ x° = 180°

140° + x° = 180°

x = 40°

Answer 2

Answer:

22 = <B

Step-by-step explanation:

The exterior angle of the triangle is equal to the sum of the 2 opposite interior angles

<3 = <A + <B

81 = 59+<B

Subtract 59 from each side

81-59 = 59+<B - 59

22 = <B