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Home > CCG > Chapter 6 > Lesson 6.1.3 > Problem 6-26


Triangle, D E F, labeled as follows: angle, e, 70 degrees, angle, f, 60 degrees, side, D E, has 1 tick mark. Triangle, J K L, labeled as follows: angle, j, 70 degrees, angle, L, 50 degrees, side, J L, has 1 tick mark.Examine the two triangles at right.  

  1. Are the triangles congruent? Justify your conclusion. If they are congruent, complete the congruence statement .

    Use the Triangle Angle Sum Theorem to help find the missing angles, then determine whether or not the triangles are similar.

  2. What series of transformation(s) are needed to change to ?

    Reflection and rotation.

  3. If units, find .

    Use the Law of Sines to solve for .