Lets say a gun is fired at a five degree angle. The gun will hit the ground 100m away. All the ballistics and stuff are calculated, so don't worry about that.
What I need to know, is how i can get the length of that curve.
Well, i need to know however long the curve is. Lets say angle is 5 degrees, and the distance from gun to point where it will hit is 100m. How long would the curve be?