Masons mark a corner using ropes of 3 m, 4 m and 5 m pulled into a triangle. Why does this give a right angle?

Question

Accepted Answer

Because 3^2 + 4^2 = 5^2. If the squares of two sides add up to the square of the third, the angle between those two sides is a right angle (converse of the theorem).

Masons mark a corner using ropes of 3 m, 4 m and 5 m pulled into a triangle. Why does this give a right angle?

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