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geometry

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I can't figure out this problem, help would be much appreciated! Suppose line BC bisects angle ABE, and D is the interior of angle ABC. If m-angle CBD=28 degrees, and m-angle ABE=136 degrees, find m-ABD.

  • geometry -

    Since BC bisects ∢ABE , m∢ABC = 68°

    so, m∢ABD = 68 - 28 = 40°

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