. ๐ด๐ต๐ถ uchburchak o'tkir. ๐ bissektrisaning oสปrta nuqtasi boสปlsin ๐ด๐ดโ, ๐ va ๐ mos ravishda ๐๐ต va ๐๐ถ nuqtalari boสปlsin, shunda โ ๐ด๐๐ถ = โ ๐ด๐0 boสปlsin. ๐ดโ๐๐๐ yozilganligini isbotlang.โโ