부채꼴'이라는 이름과 모양 사이에 괴리가 있어서 이 도형이 정말 부채꼴인지 질문하는 학생이 있었다.
There was a gap between the name and the shape of a 'sector,' — the common name is a 'fan shape' — so there was a student who asked if this figure was really a fan shape.