Use Isosceles and Equilateral Triangles

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Section 4.7

• Use Isosceles and Equilateral Triangles

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Homework

• Pg 267 11-17, 20-22

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Vocabulary

• Vertex angle the angle created by the two
  congruent legs of an isosceles triangle.
• Base the third side of an isosceles triangle
• Base angles the angles adjacent to the base.

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Theorem 4.7 Base Angles Theorem
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Theorem 4.8 Converse of Base Angles Theorem
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Corollaries
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Prove Base Angles Theorem
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Use isosceles and equilateral triangles