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
입체형은 공간에서 물체의 형태를 나타냅니다.ipchehyeongeun gonggane seo mulcheui hyangtaereul natanamnida.A three-dimensional shape represents the form of an object in space.