Solving for an unknown side in a right angle triangle.
A triangle with a 90 degree angle has sides of 39, 15, b.
Solve for b.© SolutionLibrary Inc. solutionlibary.com 9836dcf9d7 https://solutionlibrary.com/math/geometry-and-topology/solving-for-an-unknown-side-in-a-right-angle-triangle-36m
... is the hypotenuse then b^2=39^2+15^2 (I use the notation b^2 for b squared)
so b^2=2556 so ...