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Each new triangle in a square root spiral is of which type?

Answer and explanation

Correct answer: Right triangle

The governing construction in a square root spiral is the repeated addition of a unit-length perpendicular segment. At each stage, the previously obtained radius and the new perpendicular side form a triangle with a 90-degree angle. By the Pythagorean theorem, if the existing length is √n and the added side has length 1, the new hypotenuse is √(n+1), since (√n)² + 1² = n + 1. Thus every newly constructed triangle is a right triangle, so option A is correct. An equilateral triangle has three equal sides and is not produced by this perpendicular construction; a circle is not a triangle.

Related tags

Number-SystemsSquare-Root-SpiralRight-TriangleSquare Root SpiralNumber SystemsMathematicsClass 9 Mcq

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