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SWBAT apply & identify the equilateral and isosceles triangle theorem (4.5) Homework (day 28): Honors: p. 253 (2, 5, 6-21, 23, 27, 30-32)/Quiz (new constructions included) Regular: wkb p. 107-108 (1-18 and 21-23)/Quiz (new constructions included) Pearsonsuccess.net due Friday! Warm-Up: wks day 28 (#37-44) *hw/hw log/regular wkb p. 107 Tab: Storybook “Congruent Triangles” in bucket A Attach your rubric & put Tissue Box Project in “Your Block Box”

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Second Nine Weeks Extra Credit Benchmark 2- pearsonsuccess.net This will close on January 17, 2015. After you take this, if you would like it to count, please give me a piece of paper with your name and block and tell me you want me to count it and I will enter it into HAC

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Properties of Isosceles Triangles An isosceles triangle is a triangle with two congruent sides. Therefore, how many congruent angles would there be? Label the following: Vertex angle, Base angle Leg, Base B C A

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Isosceles Triangle Theorem- if two sides of a triangle are congruent opposite angles are congruent (base angles) The converse is also true…… A B C Day 28 Notes:

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50 3x – 7 x+15 A B C Find the value of x. Name Two Congruent Angles: Name Two Congruent Segments:

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Properties of Equilateral Triangles A triangle is equilateral if and only if it is equiangular. Each angle of an equilateral triangle measures 60°. 60°

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Let’s Practice “Isosceles Triangle Worksheet” ………..or Stations

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Given: Prove: StatementReason 1. 2. 3. 4. 5.

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Triangle EFG is equilateral, and segment EH bisects angle E Find the following: m<FEH= _____ m<F= _____ m<GHE= _____ Classify Triangle FHE ______ Classify triangle GEF ______

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