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Grade 8 Math lesson plan: Pythagorean theorem

Topic: The Pythagorean theorem and its converse (8.G.B.6-7). Adjust the settings, then copy the prompt.

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Planning notes for this lesson

Prerequisite skills to check: squares and square roots (8.EE.A.2); area of squares and triangles; exponents; plotting points on the coordinate plane.

Key vocabulary: right triangle, hypotenuse, leg, Pythagorean theorem, converse, square root, Pythagorean triple.

Warm-up idea: Ask how long a ladder must be to reach a window 12 feet up if its base stands 5 feet from the wall. Let students guess, then check with a scale drawing (it's 13 feet).

Exit ticket idea: Students find the missing leg of a right triangle with hypotenuse 10 and one leg 6, and decide whether a triangle with sides 7, 8 and 11 is a right triangle.

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Quiz on the same standard

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Grade 8 Pythagorean theorem quiz prompt →

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