

The evolute of a curve is the envolpe of the lines perpendicular to the curve. It is also the locus of the curve's center of curvature.



The evolute of a curve is the envolpe of the lines perpendicular to the curve. It is also the locus of the curve's center of curvature.



The catacaustic of a curve is the envelope of reflected rays orgininating from a fixed point.



The catacaustic of a curve is the envelope of reflected rays orgininating from a fixed point.



The catacaustic of a curve is the envelope of reflected rays orgininating from a fixed point.



The Isotomic of a curve is the locus of the reflection of an arbitrary fixed point over a line tangent to the curve.



The Isotomic of a curve is the locus of the reflection of an arbitrary fixed point over a line tangent to the curve.



The Isotomic of a curve is the locus of the reflection of an arbitrary fixed point over a line tangent to the curve.



