Answered

Which of the following sets of numbers could be the side lengths of a right triangle? 3, 4, and 7

9, 40, and 42

8, 15, and 16

20, 21, and 29

Verified Answer :

baileygeek

For a right triangle, the two shorter sides (the legs a and b) squared must add up to equal the longest side (the hypotenuse or c) squared. This is the pythagorean theorem:

a squared + b squared = c squared

If you try all the sets in the pythagorean theorem equation, 20, 21 and 29 are the only ones that work out, so that would be the answer.

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