수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] 내접사각형의 대각선

△π 2020.04.01 20:18 조회 465

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

원애 내접하는 사각형 ABCD의 대각선 AC와 BD가 P에서 만난다고 한다. P에서 직선 AB,CD에 내린 수선의 발을 각각 E,F라 하자. 선분 BF와 CE가 Q에서 만난다고 하자. 직선 PQ와 EF가 직교함을 보여라.

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