Question 451879
A football team snaps the ball from their 10 yard line.
 The quarterback throws to a receiver who line up 20 yards to the right of the
 quarterback and ran straight downfield.
 If the pass was 25 yards, how far downfield was the receiver when he caught the ball?
:
This forms a right triangle with the pass being the hypotenuse (25 yds), therefore
let r = dist run downfield
:
r^2 + 20^2 = 25^2
which is
r = {{{sqrt(25^2-20^2)}}}
r = 15 yds