The length of an arc which subtends an angle of x radians at the centre of a circle with radius r cm is simply rx cm.If you measure angles in degrees then it will be r*x*(pi/180) cm
If you want to find the lenght of a curve y = f(x) between two values of x, lets say x1 and x2, you must compute this integral :
Intx1 to x2[sqrt(dx2 + dy2)]
You can either express the original...