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Home > GC > Chapter 6 > Lesson 6.2.3 > Problem 6-65


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 transformation(s) are needed to change to ?

    Reflection and rotation.

  3. If units, find .

    Use the Law of Sines to solve for .