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…
19:49duration 19 minutes 49 seconds
More about Areas and Volumes (2) (English…
More about Areas and Volumes (2) (English subtitles available)
Nicole and Johnny discuss and solve the problem…