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1 March, 11:30

If angle A is a complement of angle B, angle B and angle C are vertical angles, and the supplement of C has a measure of 140°. Find the measure of A.

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  1. 1 March, 11:41
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    50°

    Explanation:

    Complementary angles add up to 90°.

    Supplementary angles add up to 180°.

    Vertical angles are equal.

    A + B = 90°

    B = C

    C = 180° - 140°

    C = 40°

    B = 40°

    A = 50°
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