Formulas Properties Related Web Sites History Description Hypotrochoid describes a family of curves. Hypotrochoid and epitrochoid are roulette of two circles. If one circle is inside another, the curve traced are called hypotrochoids.
Many famous curves are special cases of hypotrochoid.
Q be a point fixed on B. Let B roll inside circle A without slipping. The trace of Q is hypotrochoid. A be a, and Let the distance from the tracing point to the center of circle B be h. However, it is convenient to have both a and b in formulas. Related Web Sites see Generic Reference Page .