Roulette
Spirograph
Hypocykloid
Astroid
Epicykloid
Trochoid
Epitrochoid
Hypotrochoid
Involute
Involute and evolute
Tractrix (red) as an involute of a catenary
The evolute of a tractrix is a catenary
Involute and evolute
Tractrix (red) as an involute of a catenary
The evolute of a tractrix is a catenary