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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 화려한 복귀 알림
집돌이 페렐만 2019.11.08 04:17 조회 691
문제 푼 사람 1명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

집돌이 페렐만이 돌아왔습니다! 그 이유는 잠수 전 마지막 문제가 해결 되었기 때문입니다!

복귀 기념 이벤트를 진행합니다.

사각형 ABCD가 있습니다. 이 사각형에 대해 다음의 조건들이 있고, 겹치지 않게 랜덤으로 2개를 뽑을 때 평행사변형이 나올 확률을 구하시오.

1. 두 쌍의 대변이 평행한가?(선분AB(이하 선분 표시 생략)와 CD)

2. 두 쌍의 대변이 평행한가?(BD와 AC)

3. 한 쌍의 대각의 크기가 같은가? (각A와 각D)

4. 한 쌍의 대각의 크기가 같은가?(각 B와 각 C)

5. 대각선의 교점을 O라고 할 때, AO = DO인가?

6. 대각선의 교점을 O라고 할 때, BO = CO인가?

7. 두 쌍의 대변의 길이가 같은가?(선분AB와 CD)

8. 두 쌍의 대변의 길이가 같은가?(BD와 AC)

 

이 문제를 푸시면 페렐만의 난제2번 문항에 대한 힌트를 드립니다

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  •  
    21세기오일러 Lv.11 2019.11.08 05:04

    한 쌍의 대변 아닌가요?

    댓글 작성하기 좋아요0 댓글수2
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    해결
    은총알 Lv.11 2019.11.08 06:11 비밀댓글

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    비밀 댓글이 등록 되었습니다.
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