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Home > GC > Chapter 7 > Lesson 7.1.1 > Problem 7-6


Examine  and at right.  

  1. Assume the triangles above are not drawn to scale. Using the information provided in each diagram, write a mathematical statement describing the relationship between the two triangles. Justify your conclusion.

    Use the Triangle Angle Sum Theorem to find the unknown angle in each triangle.
    This will help you determine the relationship between the two triangles.

  2. Find and .

    The corresponding sides of similar triangles will all have equal ratios to one another.

Triangle A, B, C, where side A, B is 14 and side B, C is 20.  Angle B is 25 degrees and angle C is 39 degrees.

Triangle D, E, F, where side E, F is 14.  Angle E is116 degrees and angle D is 39 degrees.