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The basic Pythagorean Triple is 3-4-5. Multiply this by 7 and you get 21-28-35, so 35 is the length of the hypotenuse.

Check: 212 + 282 = 441 + 784 = 1225 which is the square of 35.

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Q: What is the length of the hypotenuse of a triangle that has legs with the measure of tweenty-one and tweenty-eight?
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