week4(10/01)Further Geometric Properties of Cycloids

nephroid may be regarded as a catacaustic of the cardioid


cardioid may be regarded as a catacaustic of the circle


a pair of orthogonal cardioids sharing the same cusp


two cardioids sharing the same cusp


gear-tooth coupling among a deltoid, an astroid


two rotating cardioids meeting orthogonally


two rotating cardioids meeting tangentially


a rotating cardioid and a rotating nephroid meeting tangentially


a rotating cardioid and a rotating nephroid meeting tangentially


two orthogonal cardioids meeting on a deltoid


all the interesting epi- and hypocycloids