Advanced Math practice question

Answer: 34

With sides l and w: lw = 60 and l² + w² = 169. Then (l + w)² = 169 + 120 = 289, so l + w = 17 and the perimeter is 34. (The sides are 5 and 12.)

Common wrong answers

If you answered 17

17 is l + w, half the perimeter.

If you answered 26

26 is twice the diagonal.

If you answered 289

289 is (l + w)².

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