Consider the following in the picture in the website below.

Question

www.webassign.net/waplots/3/a/808112f7e2262ae957c47b37497635.gif

Find the length of the third side of the triangle in terms of x.

Answer 1

what, did you forget the Pythagorean theorem? If the 3rd side is y, then
y^2 = 7^2 - x^2
remember?

Answer 2

i forgot