Download 4.5 Isosceles and Equilateral Triangles Objective: To use and apply

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4.5 Isosceles and Equilateral Triangles
Objective: To use and apply properties of isosceles and equilateral triangles.
Properties of Isosceles Triangles
 If two sides of a triangle are congruent, then the angles opposite them are
congruent.
If AB  AC,
then  B   C.
 If two angles of a triangle are congruent, then the sides opposite them are
congruent.
If  B   C,
then AB  AC.
 If a triangle is equilateral, then it is an equiangular.
 If a triangle is equiangular, then it is an equilateral.
HMW: pp 253-256 10, 12, 13, 30, 37, 38, 42, 44, 20, 21
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