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If a new hypotenuse is made from √11 in a square root spiral, which one is obtained?

Answer and explanation

Correct answer: √12

The governing rule is obtained from the Pythagorean theorem. A unit segment is drawn perpendicular to the existing hypotenuse. If that hypotenuse is √11, then the new hypotenuse h satisfies h² = (√11)² + 1² = 11 + 1 = 12. Taking the positive length gives h = √12. Therefore option C is correct. √10 represents the preceding member of the sequence, and √11 is the original hypotenuse rather than the new one. √22 would result from a different calculation and has no basis in adding a perpendicular unit segment. The spiral therefore moves from √11 to √12, just as it moves from √n to √(n + 1) at every stage.

Related tags

Number-SystemsSquare-Root-SpiralNext-RootPythagorasSquare Root SpiralNumber SystemsMathematicsClass 9 Mcq

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