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A student says that \(\sqrt{13}\) cannot be represented on a square root spiral because 13 is not a perfect square. Which option correctly corrects the statement?

Answer and explanation

Correct answer: It can be represented; a right triangle with sides \(\sqrt{12}\) and 1 has hypotenuse \(\sqrt{13}\).

In a square root spiral, each new right triangle uses the previous hypotenuse and a unit side. \((\sqrt{12})^2+1^2=12+1=13\), so its hypotenuse is \(\sqrt{13}\). Exam tip: apply Pythagoras’ theorem.

Related tags

Number SystemsSquare Root SpiralPythagoras TheoremIrrational NumbersGeometryClass 9MathematicsClass 9 Mcq

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