Use Isosceles and Equilateral Triangles

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Presentation transcript:

Use Isosceles and Equilateral Triangles Geometry Section 4.7 Use Isosceles and Equilateral Triangles

Isosceles Triangle Vertex angle leg leg base Base angles

Base Angles Theorem If two sides of a triangle are congruent, then the angles opposite them are congruent

Converse of Base Angles Theorem If two angles of a triangle are congruent, then the sides opposite them are congruent

Corollary to the Base Angles Theorem If a triangle is equilateral, then it is equiangular

Corollary to the Converse of Base Angles Theorem If a triangle is equiangular, then it is equilateral

Examples Examples

Assignment Section 4.7 Page 267 Problems #3-6, 8-12, 16, 24, 32, 40, 42