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Curved Surface Area of a Cone 圓錐的曲面面積

Author:Alex CHIK, Anthony OR 柯志明

Topic:Area, Cone, Surface

Modified from https://www.geogebra.org/material/show/id/P8NBphTJ by Anthony Or.

GeoGebra 互動數學教室 http://www.geogebra.hk

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