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Home > CC3 > Chapter 10 > Lesson 10.1.4 > Problem 10-61

10-61.

Calculate the value of . Homework Help ✎

  1. 10-61 (a)

    Angle is an exterior angle.

    An exterior angle is equal to the sum of the two remote interior angles.

  1. 10-61 (b)

    Vertical angles are always congruent. The angle that is vertical to is also supplementary to the given angle.