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5.4 Equilateral and Isosceles Triangles
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What We Will Learn Base Angles Thm
Using Isosceles and Equilateral triangles
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Needed Vocab Legs of isosceles triangle: the two congruent sides
Vertex angle: angle formed by the legs Base: third side of isosceles triangle Base angles: two other angles formed by the base and the legs
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Ex. 1 Naming Parts Fill in the blanks 1. G and K 2. KH and KJ
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Ex. 2/3 Finding Angle Measures
Find x and y Finding y: y = 4 Sides opposite congruent angles are congruent Finding x: NL = 4 NL = LM 4 = x + 1 −1 −1 3 = x
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Your Practice Find x and y x = 60 y = 60
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