直線和平面之交角

[@icefamily2002]

睇完之後完全明白晒，之前真係諗到頭都爆都諗唔到，實在萬分感激👏👏👏

[@gabrielhui425]

多謝晒，睇完這片終於明白番晒，之前吾系太明

[@ChunChunlala]

可唔可以有多D三維空間教學

[@Jc-ub6vw]

很棒

[@chares19961224]

好實用..拍多D片啦!!

[@ericlam3970]

有用，thx so much

[@kamantam3831]

明曬 thx for sharing

[@funnytalk7297]

Good

[@user-nx4kz5cb2q]

Hi

[@mryip06]

有個重要概念無講，就係咩叫垂直那個面

[@uu6713]

同意