Chalkboard with Pythagorean Theorem - Stock Image

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Description
Old well-worn green chalkboard showing part of the Pythagorean Theorem; that is, "In any right triangle, the area of the square whose side is the hypotenuse (the side opposite the right angle) is equal to the sum of the areas of the squares whose sides are the two legs (the two sides that meet at a right angle)." Also expressed that the square of the hypotenuse = the sum of the squares of the other two sides.
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