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수학동아 - 폴리매스
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실생활에서 수학이 어떻게 활용되는지 확인해 보세요!
[수학자] 숫자4 이야기
수학동아 2018.12.28 02:46 조회 985
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

 

봄, 여름, 가을, 겨울 4계절과 태극기 4괘인 건, 곤, 감, 이는 물론, 동서남북 4방위와 그에 따른 4신(四神) 청룡, 백호, 주작, 현무까지…. 숫자 4의 예는 무궁무진하다. 특히 수학에서는 좌표평면을 4개의 면으로 나누어 제 1, 2, 3, 4 사분면이라고 부르기도 하고, 사물의 기본적인 형태 중 하나인 사각형과 가장 단순한 입체도형 중 하나인 사면체에도 숫자 4가 어김없이 등장한다. 숫자 4에 대해 알아 보자.

태그
#4 #하켄의4색정리 #지도색칠하기 #4개의4 #FourFours #바이올린
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