如图,AD是△ABC的角平分线.DE//AC,DE交AB于点E,DF//AB,DF交AC于点F.图中∠1与∠2有什么关系?为什么?
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![如图,AD是△ABC的角平分线.DE//AC,DE交AB于点E,DF//AB,DF交AC于点F.图中∠1与∠2有什么关系?为什么?](/uploads/image/z/2557753-25-3.jpg?t=%E5%A6%82%E5%9B%BE%2CAD%E6%98%AF%E2%96%B3ABC%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF.DE%2F%2FAC%2CDE%E4%BA%A4AB%E4%BA%8E%E7%82%B9E%2CDF%2F%2FAB%2CDF%E4%BA%A4AC%E4%BA%8E%E7%82%B9F.%E5%9B%BE%E4%B8%AD%E2%88%A01%E4%B8%8E%E2%88%A02%E6%9C%89%E4%BB%80%E4%B9%88%E5%85%B3%E7%B3%BB%3F%E4%B8%BA%E4%BB%80%E4%B9%88%3F)
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