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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Line: 315
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Line: 19
Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: getFloatingMyInfo
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Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
전자기역학
2020.05.25 03:31
조회 682
다양한 정보들이 넘쳐나는 폴리매스 카페의 링크 https://cafe.naver.com/polymathfun
어떤 원의 원주 위에 점 A1부터 An까지 있다. 여기에서 모든 대각선들을 이었다.
(1)이 원의 현이 삼각형의 변 중 3개를 차지하고 있을 때(즉, 그 원의 내접삼각형), 그런 삼각형의 개수를 세어라.
(2)이 원의 현이 삼각형의 변 중 2개를 차지하고 있을 때, 그런 삼각형의 개수를 세어라.
(3)이 원의 현이 삼각형의 변 중 1개를 차지하고 있을 때, 그런 삼각형의 개수를 세어라.
(4)이 원의 현이 삼각형의 변 중 0개를 차지하고 있을 때, 그런 삼각형의 개수를 세어라.
모두 풀이 필수!
지금 바로
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