Circle A is centered at the origin and has a radius of 3.
Circle D is centered at the origin and has a radius of 5.
Circle L has a movable center and a changeable radius.
Derivative as Locus
Parabolic segment area
f(x) = - 0,5x³ - 0,25x² + 1,025x + 0,0125 sur [- 1 ; 2,5]