Arcs and conics

Given three points, we can draw an arc. Select the Arc tool, create three different points, and an arc passing through such three points will appear.

Circumferences can be drawn in two different ways. Either we choose the centre and its radius, or we choose three points to construct a circumference passing through them.

To write a parabola, we choose its directrix, and then we move the mouse to place the focus.

Ellipses are constructed given their focus and their eccentricity.

A similar manner is used for hyperbolas: we choose the focus and then the eccentricity.

We can locate five points in a more general approach, and a conic passing through them will be constructed. The conic will change as we move to the fifth point.