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If the 1-unit perpendicular side in a square root spiral is changed to 2 units, why will the usual sequence change?

Answer and explanation

Correct answer: Because the rule of adding 1 at each step will break

The governing concept is the Pythagorean theorem used repeatedly in the usual square root spiral. When a perpendicular side of 1 unit is added to a previous hypotenuse of length √n, the new hypotenuse satisfies h²=(√n)²+1²=n+1. Thus the squared hypotenuse increases by exactly 1, producing values such as √2, √3 and √4. If the added perpendicular is changed to 2 units, the relation becomes h²=(√n)²+2²=n+4. The construction still makes right triangles and the angle can still be 90°, but it no longer generates consecutive square roots. Therefore option A is correct; the other choices misunderstand what changes in the construction.

Related tags

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

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