Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
수학에서 반평면은 한 쪽으로 무한히 뻗어 있는 평면의 일부입니다.suhakeseo banpyeongmyeoneun han jjogeuro muhanhi ppeodeo itneun pyeongmyeonui ilbuimnida.In mathematics, a half plane is a part of a plane that extends infinitely in one direction.