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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] 도형분할퍼즐 2

21세기오일러 2018.09.24 03:57 조회 1425

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

1. 똑같은 정사각형 3개가 있습니다. 이 3개의 정사각형을 9개의 조각으로 나누어서 큰 정사각형 1개가 되도록 맞추어 보세요.

2. 정사각형을 정사각형으로 9등분하고 4조각을 빼서 십자가를 만들었습니다. 이를 9조각으로 나누어 모두 사용하여 작은 정사각형 5개도 만들 수있고 또 그조각으로 큰 정사각형 1개도 만들수있게 나누어 보세요.

이전글 암호 해독 2탄

다음글 한 건축가의 운명

이 문제 어떠셨나요?

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댓글 작성하기

sincostan Lv.7 2018.09.24 04:52

크기는 A4용지 싸이즈로 하면 되죠?

댓글 작성하기 좋아요0 댓글수1
- 21세기오일러 Lv.11 2018.09.24 06:10
  
  크기는 상관 없습니다.
  
  좋아요0
바람개비 Lv.5 2018.09.25 01:21

정사각형 각각을 9분하는 건가요? 조각의 전체 개수가 9개인가요?

그리고 모든 정사각형(조각)은 큰 정사각형의 일부인가요?

댓글 작성하기 좋아요0 댓글수1
- 21세기오일러 Lv.11 2018.09.25 20:54
  
  조각의 수가 9개이고 모든 조각을 남김없이 써야합니디.
  
  좋아요0
아인수타인 Lv.12 2018.09.26 10:42

2번 정답(그림이 이상해도 이해해주세요.)

이렇게 짤라

이렇게 한다.

댓글 작성하기 좋아요0 댓글수4
- 21세기오일러 Lv.11 2018.09.27 00:30
  
  죄송합니다. 문제 설명이 부족했네요. 9개를 모두 사용하여 큰 정사각형 1개를 만들 수 있고 또 그 조각 9개로 정사각형 9개도 만들 수 있다는 뜻이었습니다.
  
  좋아요0
- 21세기오일러 Lv.11 2018.09.27 00:31
  
  문제 수정하였습니다.
  
  좋아요0
- 바람개비 Lv.5 2018.09.27 08:28
  
  문제를 더 쉽게 만들다니...
  
  십자가를 정사각형 5개로 나눈 다음 정사각형 1개 제외하고 남은 사각형을 (직각 삼각형이 되도록) 알맞게 자르세요.
  
  좋아요0
- 21세기오일러 Lv.11 2018.09.28 00:16
  
  바람개비님 맞았습니다. 그런데 그림을 같이 올려주시면 감사하겠습니다
  
  좋아요0
바람개비 Lv.5 2018.09.27 08:18

첫번째 문제는 직접 생각하신거에요?

댓글 작성하기 좋아요0 댓글수1
- 21세기오일러 Lv.11 2018.09.28 00:16
  
  제가 책에서 본 비슷한문제를 수정해서 만들었습니다.
  
  좋아요0
21세기오일러 Lv.11 2018.09.29 22:17

이제 2번은 풀렸고 1번만 풀면됩니다. 부분해결딱지 붙여주세요.

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- 아인수타인 Lv.12 2018.10.11 00:38
  
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  잠만, 2번 풀이가 이해가 안 가서 그런데요, 전체 넓이가 5이고, 큰 정사각형은 한 변이 $\sqrt{5}$ 가 되는데 어떻게 넓이가 1인 정사각형과 넓이가 $\frac{1}{2}$ 인 직각이등변삼각형 8개로 넓이가 5인 정사각형을 만들수 있죠?
  
  좋아요0
- 21세기오일러 Lv.11 2018.10.14 00:16
  
  핸드폰으로 사진 어떻게 올리나요.
  
  못 올려서 풀이를못드리겠네요ㅠㅠ
  
  좋아요0
- 아인수타인 Lv.12 2018.10.18 09:06
  
  다른 곳에 달린 댓글 보니깐 다른 분들은 저와 다른 방식으로 사진 올리시는 것 같긴 하지만; 이렇게 올리면 됩니다.
  
  (1) 핸폰으로 사진 찍고 카톡으로 보낸다. (단, 요 방법은 컴퓨터에 카톡 있는 분만 올릴 수 있다는 게 함정;;;)
  
  (2) 사진을 저장한다.
  
  (3) 댓글 입력하기에 이미지(위쪽)를 클릭하고, 파일 업로드를 누른다.
  
  (4) 찾아보기를 눌러 아까 저장했던 사진을 찾고, 클릭한다.
  
  (5) '서버로 전송'버튼을 누른다.
  
  (6) 크기를 조절한 후, 확인 버튼을 누르면 끝~
  
  좋아요0