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Home > INT2 > Chapter 1 > Lesson 1.3.1 > Problem 1-77

1-77.

Examine the diagrams below. What is the angle pair relationship between the labeled angles? Use the relationship to write an equation and solve for . Then confirm your answer by calculating the angle measures of the labeled angles.

  1. Two intersecting lines. About the point of intersection are the angles labeled clockwise: blank, 3 x + 5 degrees, blank and 5 x minus 57 degrees.

    They are vertical angles and the measures are congruent.


  1. Two intersecting lines. About the point of intersection are the angles labeled clockwise: blank, 4 x + 150 degrees, 2 x and blank.

    They form a straight angle pair, so they are supplementary.

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