14:45duration 14 minutes 45 seconds
續面積和體積(一) (中文字幕可供選擇)
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…
14:43duration 14 minutes 43 seconds
More about Areas and Volumes (1) (English…
More about Areas and Volumes (1) (English subtitles available)
The concepts of arc and sector are first…