direction of fit
Triangle of reference
https://source.unsplash.com/featured/?direction-of%20fit#.png
/suto3/google.icondirection of fit
/suto3/Google画像検索.icondirection of fit
/suto3/Google定義検索.icon direction of fit
/suto3/wikipedia.icondirection of fit
/suto3/weblio.icon direction of fit
/suto3/kotobank.icon direction of fit
/suto3/jisho.icon direction of fit