A circle rolling outside another circle
RADIUS OF THE ROLLING CIRCLE = r = 25 mm
RADIUS OF THE DIRECTING CIRCLE = R = 75 mm
Theta = (r/R) * 360 = (25/75)*360 degrees = 120 degrees
Tangent and Normal at any Given point
#epicycloid #engineeringdrawing #engineeringgraphics #cycloidalcurves
