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[기하] 각도 표기법의 발견
수학동아 2018.12.27 23:48 조회 1130
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

 

이등변삼각형의 형태로 아름답게 빛나는 다리의 주인공은 러시아 블라디보스톡에 위치한 러스키교다. 이 다리는 전체 길이 3100m, 두 탑간의 거리가 1104m로 세계에서 가장 긴 사장교로도 잘 알려졌다. 그런데 사진을 조금만 들여다보면 삼각형, 수직, 각도 등 다양한 도형의 개념을 쉽게 확인할 수 있다. 이처럼 다리나 건축물 등 일상 생활 속에서 쉽게 만날 수 있는 삼각형, 수직, 각도의 표기법은 누가 만든 것일까?

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