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Home > GC > Chapter 5 > Lesson 5.3.2 > Problem 5-79


Triangle D, E, F, with angle, D, labeled 54 degrees, and angle, F, labeled 54 degrees.Lizzie noticed that two angles in , shown at right, have the same measure. Based on this information, what statement can you make about the relationship between and ?  

They must have equal lengths, because if base angles are equal, then the sides opposite them are equal and the triangle is isosceles.