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GeoGebraGeoGebra Classroom

Animation 45

What 3 geometry theorems are dynamically being illustrated in the applet below? You can actually only view 1 theorem at a time. To see a theorem other than the one currently being seen here, move any 1 (or more) pink points as far up or down the circle as you possibly can. (Feel free to move any point anywhere you'd like at any time!)