[問題] 相似形
現在國三差不多教到這吧
那來玩個一題吧XDD
先說好~段考沒考完的不能玩噢...我不想造孽
1.試證兩內角平分線相等的三角形是等腰三角形
先講好...我要"純幾何"解
三角函數跟座標化不要亂入= =凸
先謝謝大家幫忙了XDD
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