Alternate interior angles

The notion of alternate interior angles is necessary to draw Eratosthenes geometric figure.

Aim:

notion of alternate interior angle

Observation

Show that the angles that lie on the inner side of the parallel lines but on the opposite sides of the transversal are equal.

Production

Slideshow or pdf of the observations

Geogebra

https://www.geogebra.org/classic/fxnmtxqg