画∠AOB=90°,并画∠AOB的平分线OC画∠AOB=90°,并画∠AOB的平分线OC1)把三角尺的直角顶点落在OC的任意一点P上,使三角尺的两边直角边分别与OA、OB相交于点E、F(如图①).度量PE、PF的长度,这两
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![画∠AOB=90°,并画∠AOB的平分线OC画∠AOB=90°,并画∠AOB的平分线OC1)把三角尺的直角顶点落在OC的任意一点P上,使三角尺的两边直角边分别与OA、OB相交于点E、F(如图①).度量PE、PF的长度,这两](/uploads/image/z/15013533-21-3.jpg?t=%E7%94%BB%E2%88%A0AOB%3D90%C2%B0%2C%E5%B9%B6%E7%94%BB%E2%88%A0AOB%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BFOC%E7%94%BB%E2%88%A0AOB%3D90%C2%B0%2C%E5%B9%B6%E7%94%BB%E2%88%A0AOB%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BFOC1%EF%BC%89%E6%8A%8A%E4%B8%89%E8%A7%92%E5%B0%BA%E7%9A%84%E7%9B%B4%E8%A7%92%E9%A1%B6%E7%82%B9%E8%90%BD%E5%9C%A8OC%E7%9A%84%E4%BB%BB%E6%84%8F%E4%B8%80%E7%82%B9P%E4%B8%8A%2C%E4%BD%BF%E4%B8%89%E8%A7%92%E5%B0%BA%E7%9A%84%E4%B8%A4%E8%BE%B9%E7%9B%B4%E8%A7%92%E8%BE%B9%E5%88%86%E5%88%AB%E4%B8%8EOA%E3%80%81OB%E7%9B%B8%E4%BA%A4%E4%BA%8E%E7%82%B9E%E3%80%81F%EF%BC%88%E5%A6%82%E5%9B%BE%E2%91%A0%EF%BC%89.%E5%BA%A6%E9%87%8FPE%E3%80%81PF%E7%9A%84%E9%95%BF%E5%BA%A6%2C%E8%BF%99%E4%B8%A4)
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