原題:
https://bbs.wenxuecity.com/myhouse/13745681.html
套路:變換的藍紅綠的三角形是相等的,因為問題本身隱含表明這個三角形的麵積不依賴F的位置=
綠三角形麵積=18。
原題:
https://bbs.wenxuecity.com/myhouse/13745681.html
套路:變換的藍紅綠的三角形是相等的,因為問題本身隱含表明這個三角形的麵積不依賴F的位置=
綠三角形麵積=18。
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