Practice A Isosceles and Equilateral Triangles

Converse of Isosceles Triangle Theorem If two angles of a triangle are congruent, then the sides opposite those angles are congruent. NM L If N M, then LN _ LM . You can use these theorems to find angle measures in isosceles triangles. Find m E in DEF. m D m E Isosc. Thm. D E F 5x° (3x 14)° 5x ° (3x + 14)° Substitute the given values. 2 x ... ................
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