A triangular field has legs measuring 30 meters and 40 meters meeting at a right angle. How many meters of fencing are needed to enclose the whole perimeter?
120 meters
By the Pythagorean theorem, hypotenuse = sqrt(30^2 + 40^2) = 50m. Perimeter = 30 + 40 + 50 = 120m.
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Hard. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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