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5 October, 11:29

What is the measure of angle B in degrees? A triangle has angles A, C, 51 degrees. Angle A has exterior angle B and angle C has an exterior angle with measure of 112 degrees. °

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  1. 5 October, 14:01
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    Step-by-step explanation:

    The angle adjacent to 112° will form a straight angle along with 112° adding to 180°. That makes C: 68°

    a+c+51 = 180

    a+68°+51° = 180°

    a+119° = 180°

    a = 180° - 119°

    a = 61°

    a+b = 180°

    61+b = 180

    b = 180-61

    b = 119°
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