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Geometry Section 4.6 Isosceles Triangle Theorem

Geometry Section 4.6 Isosceles Triangle Theorem. Goals for today: 1. Identify the parts of an isosceles triangle. 2. Learn and apply the Isosceles Triangle Theorem and its converse.

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Geometry Section 4.6 Isosceles Triangle Theorem

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  1. Geometry Section 4.6Isosceles Triangle Theorem

  2. Goals for today:1. Identify the parts of an isosceles triangle.2. Learn and apply the Isosceles Triangle Theorem and its converse.

  3. Recall that an isosceles is a triangle with _________________.The congruent sides are called the ____ and the noncongruent side is calledthe_____. The angle formed by the two legs is called the ___________ while the two angles at each end of the base are called ___________. two congruent sides legs base vertex angle base angles

  4. Theorem 4.6 Isosceles Triangle Theorem (ITT)If two sides of a triangle are congruent, then the angles opposite those sides are congruent.

  5. Theorem 4.7Converse of the Isosceles Triangle Theorem (ITTC)If two angles of a triangle are congruent, then the sides opposite those angles are congruent.

  6. Examples: Solve for x.

  7. A 450 B C

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