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


Triangle D, E, F, has two angles, 70 degrees, and 60 degrees. The side opposite the 60 degree angle has 1 tick mark. Triangle J, K, L, has two angles 70 degrees and 50 degrees. The side opposite the unknown angle 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 .