Calculate Area, Circumference, Diameter and Radius of a Circle (circle) Calculate Area of a Quadrilateral (quadlat) Hypotrochoid Curve 1 (hypo1) Hypotrochoid Curve 2 (hypo2) Hypotrochoid Curve 3 (hypo3) Hypotrochoid Curve 4 (hypo4) Hypotrochoid Curve 5 (hypo5) Lissajous Curve (lissa)