Dynamic constructions

GeoGebra is a dynamic software. In the following video you can see some examples of it: You construct something using points, then you drag these points and the construction chnages as well.

Dynamic triangle: drag the points A and B to change the triangle

A line through 2 points: drag the points A and B to change it

Polynomials: drag the points A and B

Integrals: drag the points A and B to change the integration limits