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
두 삼각형이 충상호형이면, 그들은 크기와 모양이 같습니다.du samgak-hyeongi chungsanghohyeongimyeon, geudeul-eun keugiwa moyangi gatseumnida.If two triangles are congruent, they have the same size and shape.