Practice applying the Pythagorean Theorem in this tutorial about the distance formula. You may know how to use two coordinate points to calculate the distance between them, but did you know you can solve for other unknowns? Challenge yourself by discovering how to find an unknown coordinate by approaching the distance formula from a different angle.
If you know where one point is -- let's say (4,8) -- and you know one only coordinate of another point -- (-50, ?) -- and you know the distance between the points -- 200 -- here's how to use the distance formula to figure out that missing coordinate!