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Home > CCG > Chapter 6 > Lesson 6.2.5 > Problem 6-97


For each shape below, use the geometric relationships to solve for the given variable(s). Show all work. Name the geometric relationships you used. Homework Help ✎

  1. triangle

    What is the sum of the angles within a triangle?

    , Triangle Angle Sum

  1. triangle

    What do the tick marks on the sides of the triangles mean?

    , Isosceles triangle

  1. triangle

    Extend the parallel sides.

    Parallel lines have same side interior supplementary angles.

    By the Equal Values Method:

    Parallel lines

  1. triangle

    Use the Law of Cosines to solve for the unknown side.