Construct a pair of rotating orthogonal cardioids. 

Construct a pair of rotating orthogonal nephroids. 

Construct a pair of rotating orthogonal deltoids. 

Construct a pair of rotating orthogonal astroids. 

Construct rotating cardioid and nephroid while remaining orthogonal to each other. 

Construct rotating nephroid and threecusped epicycloid while remaining orthogonal to each other. 

Construct rotating cardioid and deltoid while remaining orthogonal to each other. 

Construct rotating cardioid and astroid while remaining orthogonal to each other. 

Construct two cardioids having the same cusp and orthogonal to each other. 
