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Learning Goal

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Isosceles and equilateral triangle properties

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Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework

"Use concepts and theorems relating to congruence and similarity of triangles to solve problems." "Know and directly apply relevant theorems such as the: • triangle angle sum theorem."

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"Use concepts and theorems relating to congruence and similarity of triangles to solve problems."
"Know and directly apply relevant theorems such as the: • triangle angle sum theorem."

What you'll learn

  1. State and apply the base angles theorem: if two sides of a triangle are equal, the angles opposite those sides are equal
  2. Use the converse: if two angles of a triangle are equal, the sides opposite those angles are equal
  3. Recognize that an equilateral triangle has three 60-degree angles and three equal sides
  4. Solve for unknown angles and sides in isosceles and equilateral triangles, including algebraic expressions

Slides

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