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수학동아 - 폴리매스
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[기하] 이야기로 배우는 삼각비
수학동아 2018.12.27 20:27 조회 1461
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어마어마하게 높은 바위산이나 바다 한 가운데 우뚝 선 등대의 높이는 어떻게 잴 수 있을까? 밤하늘에 떠 있는 보름달은 얼마나 멀리 떨어져 있는 걸까? 직접 자로 잴 수 없을 만큼 거대한 높이와 기다란 길이를 재는 단순한 방법이 있다. 직각삼각형을 이용하는 것이다.

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