Inscribed angle is half of its central angle!!

You can believe it! Just make sure you know that this is not a proof!! You can drag the points wherever you want before you start. Made in GeoGebra!!! Find my complete file here.

Congruent Chords and Arcs

Hi. I am trying to find a way to combine #GeoGebra files in a version of an online reference book.
Wish me luck. I think PowerPoint might be good.

Some trinomial practice

This was created in #GeoGebra (there is a reason for "Gebra" in that name!) Find it on line here.

Approximating pi

Drag the slider to increase the number of sides in the polygon.

The Golden Arches

I have read and heard quite a bit over the years as to the curves in the Golden Arches of McDonald's.

Play around with this. It might clue you in, but it leaves a lot of stones unturned. Just drag the points to locations (anywhere, no special order) along the curve you are investigating, then click "show graph".