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In this lesson, students use similar triangles within a right triangle to prove the Pythagorean Theorem. They must use the structure of the right triangles and the algebraic structure of the proportional segments to show that They also construct convincing arguments for the Pythagorean Theorem and examine an alternate way to prove the theorem (MP3).
Students will continue adding to their reference chart in this lesson. Be prepared to add to the class display. The Blank Reference Chart for students and a teacher copy of a completed version are available in the blackline masters for the unit.
If there are multiple sections of this course in the same classroom, consider hiding entries on the class reference chart and revealing them at the appropriate time rather than making multiple displays.