Etv教育電視丨續面積和體積（一）丨數學科
Synopsis
主持人首先剪開圓錐體紙杯來介紹弧和扇形，然後利用圓心角，扇形角，圓周和圓的面積，計算弧長和扇形的面積；並以演示數學家 ...
![HKDSE F2 MATH 數學 Areas and Volumes 面積和體積4 扇形面積 [停課不停學]](https://i.ytimg.com/vi/Uo-6RKYCygg/hqdefault.jpg?sqp=-oaymwEcCOADEI4CSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLDirLGSXBjzHVVUiLIwvVJfqDqPBg)
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