Question 1038898
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how do you figure out how to find the length of leg a when you know leg b and the hypotenuse c.
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Like millions of other people, we use the Pythagorean theorem


a = {{{sqrt(c^2 - b^2)}}}.


On Pythagorean theorem see the lessons

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Pythagorean-theorem/The-Pythagorean-Theorem.lesson>The Pythagorean Theorem</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Pythagorean-theorem/More-proofs-of-the-Pythagorean-Theorem.lesson>More proofs of the Pythagorean Theorem</A>

in this site.