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作者：
Ann Schnurbusch
GeoGebra
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GGB is Awesome!
bewijs stelling van Pythagoras
Average Value of a Function
רישום חופשי
Area Between Two Curves
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Dynagraph 4
Inscribed Angle Investigation
rotation
Images 1. Rhombicosidodecahedron from Biscribed Pentakis Dodecahedron for the case of trisection of its 1st-order segments
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指數函數
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正切線或正切
正三角形
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