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수학동아 - 폴리매스
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[킹앤카&킹앤포&킹앤유] 퀴3. 대학생 새내기를 위한 새방 만들기
수학동아 2017.05.24 03:02 조회 914
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

KASIT 수학문제연구회 학생들이 출제한 수리 논술 문제입니다. 문제를 잘 풀어준 학생을 뽑아 수학문제연구회 학생들이 직접 답안을 첨삭해줄 예정입니다. 문제를 풀어 보세요!

 

KAIST에서 새내기를 위한 공간인 ‘새방’을 만들려고 한다. 새내기가 자주 가는 인문사회과학부동과 창의학습관, 새내기 기숙사 사이에 마련하려고 한다. 이때 새내기 기숙사에서 인문사회과학부동까지의 거리는 300m이고, 새내기 기숙사부터 창의학습관까지의 거리는 500m다. 인문사회과학부동과 새내기 기숙사, 새내기 기숙사와 창의학습관을 잇는 직선은 60°를 이루고 있다. 새방에서 세 지점까지의 거리의 합이 최소가 되게 할 때, 그 값은 어떻게 구할 수 있을까?

 

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