Day 1: Triangles and similarity

“Within the accuracy of the measurements, the measured sides are consistent with a right triangle.” ... If the sum of the squares of the lengths of the two smaller sides of a triangle equals the square of the length of the third side, then the angle opposite the third side is a right angle. Because 32 + 42 = 52 (that is, 9 + 16 = 25), a ... ................
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