101 Animations!!! (V2)

Each animation below dynamically illustrates a definition, theorem, or other mathematical concept. Can you correctly identify the definition, theorem, or concept dynamically being illustrated in each? If so, try to write this definition, theorem, or concept in your own words. In any animation, selecting the "check" button will display both a name and detailed description of the animation. Enjoy!!! For 101 Animations!!! (V1): https://www.geogebra.org/m/HrGcYAdH For 101 Animations!!! (V3): https://www.geogebra.org/book/title/id/jjbpmcU5