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Fall, Halloween & Thanksgiving Triangles & Pythagorean Theorem

Shop fun, minimal-prep triangles and the Pythagorean theorem fall, Halloween, and Thanksgiving math lessons, activities, and worksheets. Celebrate back-to-school with themes of fall, autumn, Halloween, and Thanksgiving. You can use them other times of year, too. Practice the Pythagorean theorem and use it to find the length of sides in triangles.