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If the hypotenuse at one step is 5 units and the next unit side is drawn perpendicular to it, what is the length of the next hypotenuse?

Answer and explanation

Correct answer: √26

The governing concept is the Pythagorean theorem, because the new side is drawn perpendicular to the existing hypotenuse-like segment. The two perpendicular legs are 5 units and 1 unit, so if L is the new hypotenuse, then L² = 5² + 1² = 25 + 1 = 26. Taking the positive square root, as lengths are positive, gives L = √26 units. Therefore option A is correct. Option B, 6, comes from adding the lengths directly, but perpendicular sides combine through squares, not ordinary addition. Option C uses an incorrect subtraction, and option D is only 5², omitting the contribution of the new unit side. This repeated Pythagorean step is what generates successive square-root distances in the spiral.

Related tags

Number-SystemsSquare-Root-SpiralPythagorean-StepSquare Root SpiralNumber SystemsMathematicsClass 9 Mcq

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