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While constructing a square root spiral, a student says that to obtain \(\sqrt{8}\) after \(\sqrt{7}\), a perpendicular of length 1 should be drawn to the previous hypotenuse \(\sqrt{7}\). What is the status of the student's statement?

Answer and explanation

Correct answer: The statement is correct because the new hypotenuse will be \(\sqrt{7+1}=\sqrt{8}\).

The statement is correct. With previous hypotenuse \(\sqrt{7}\) and a new perpendicular of 1, Pythagoras gives hypotenuse² = 7 + 1 = 8, so the new hypotenuse is \(\sqrt{8}\). Exam tip: add squares, not the lengths themselves.

Related tags

Number SystemsSquare Root SpiralPythagoras TheoremIrrational NumbersGeometry ApplicationMathematicsClass 9 Mcq

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