先畫正三角形,然後證明正方形內的頂點即兩15度角的交點。
回複:小學生數學題 07
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• great. I used tg to figure it out. -yma16- ♂ (0 bytes) () 10/01/2013 postreply 19:28:20
• great. I used tg to figure it out. -yma16- ♂ (0 bytes) () 10/01/2013 postreply 19:28:20
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