A right-angled triangle has perpendicular sides of and . Find the hypotenuse.

Answer and explanation

Correct answer: D.

  1. Step 1: Pythagoras: .
  2. Step 2: cm.
Answer
.
Why not the others: is what you get if you add the two sides. is what you get if you forget the square root. is what you get if you subtract the sides.

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