[72] 重心座標 ベクトル方程式から面積比を一瞬で見抜く

Contents: Thanks for watching. In this video, I introduce how to use barycentric coordinates or center-of-mass coordinate system. Its name sounds too much, but actually it makes our lives so much easier and helps us to spare so much time. You can get a ratio of triangles if you just look at the vector expression of a point. 動画の内容：知る人ぞ知る重心座標の解説動画です。与えられた点のベクトル表現から直ちに対応する面積比を割り出すようになれる優れものです。煩瑣な計算などもひとっ飛びです。とはいえそれをあらかじめやっておくということな訳ですが、見通しが全然違います。 -------------------------------------------------------------------------------- 主に数学に関することを動画にしています。みんなで面白いことをあーだこーだ言えたらいいなと。 動画に関するアドバイス（声量・ライト・ペン・板書など）や動画にしてほしいことなど何でも受け付けております。むしろください。 連絡等はこちらに→maths.toshi@gmail.com Thanks a ton for visiting here and reading this. Please subscribe this channel and give this video a like if you like it. I usually make videos about mathematics, but any kinds of topics which I find interesting and attractive. All I want to do is just discuss and talk about them, and communicate with people who are into maths, after all. I am afraid to say that I basically speak in Japanese in my videos; however, I am going to try and write things down in the way everyone can comprehend what they are, not without mathematics literacy at least :-). I would appreciate if you gave me any kind of advice ranging from the topics you would like me to bring about to the volume, my handwriting, and the lighting in my videos. Please do not hesitate to leave any comments for this channel growth, and help me to enrich this channel.