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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] [★★★☆☆] 성냥개비 II
솔바람 2020.12.07 18:24 조회 656
문제 푼 사람 4명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

성냥개비 9개를 사용하여 20개의 정삼각형을 만드는 방법을 구하여라.

(단, 성냥개비를 교차해도 되지만 부러뜨릴 수는 없다.)

 

※ 아래 그림과 같이 배열하면 작은 정삼각형 4개, 큰 정삼각형 1개가 있으므로 총 5개로 본다.

 

이 문제 어떠셨나요?

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  •  
    해결
    NimNim Lv.9 2020.12.07 19:36 비밀댓글
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      솔바람 Lv.10 2020.12.07 19:44 비밀댓글
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    •  
      NimNim Lv.9 2020.12.07 20:18

      감사합니다!

      문제를 많이 내시는 소나무님이 더 대단하신것 같아요!

      좋아요0
    •  
      솔바람 Lv.10 2020.12.07 20:28

      뭘요~ ㅎ

      그나저나 난이도를 더 올려야겠

      좋아요0
  •  
    잭과콩나물 Lv.6 2020.12.07 20:32 비밀댓글
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      솔바람 Lv.10 2020.12.07 20:35 비밀댓글
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    MathlabJ Lv.8 2020.12.07 20:48 비밀댓글
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      솔바람 Lv.10 2020.12.07 20:58 비밀댓글
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  •  
    MathlabJ Lv.8 2020.12.07 20:52

    저는 성냥개비에 불을 붙인 뒤 넓은 초원에 불을질러서 탄 흔적으로 20개의 정사각형을 만들겠습니ㄷ

    댓글 작성하기 좋아요0 댓글수1
    •  
      솔바람 Lv.10 2020.12.07 20:58

      ..!ㅋㅋㅋㅋㅋ

      좋아요0
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    K→C≡N Lv.11 2020.12.08 00:37 비밀댓글
    확인요청중

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      솔바람 Lv.10 2020.12.08 00:45 비밀댓글
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    해결
    K→C≡N Lv.11 2020.12.08 00:48 비밀댓글
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      솔바람 Lv.10 2020.12.08 00:49 비밀댓글
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    해결
    수학동아 Lv.8 2020.12.08 04:44 비밀댓글
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      솔바람 Lv.10 2020.12.08 04:57 비밀댓글
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    알래스카불곰 Lv.7 2020.12.19 08:11 비밀댓글
    확인요청중
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      솔바람 Lv.10 2020.12.19 18:50 비밀댓글
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    해결
    호박고구마 Lv.7 2021.01.14 00:08 비밀댓글
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  •  
    K→C≡N Lv.11 2021.03.25 06:03

    http://www.polymath.co.kr/contents/view/27469

    이거 링크 보고 왔는데 

    이 문제 보자마자 든 생각: 이걸 어떻게 풀어...

     

    그런데 제가 옛날에 풀었네요?!?!

    댓글 작성하기 좋아요0 댓글수1
    •  
      솔바람 Lv.10 2021.03.25 18:26

      ㅋㅋㅋㅋ 기억상실(?)이네요~

      좋아요0

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