在∠AOB地两边OA和OB上分别取OM=ON,MC⊥OA,NC⊥OB,MC与NC交于C点.是说明年:∠MOC=∠NOC.
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![在∠AOB地两边OA和OB上分别取OM=ON,MC⊥OA,NC⊥OB,MC与NC交于C点.是说明年:∠MOC=∠NOC.](/uploads/image/z/10415718-54-8.jpg?t=%E5%9C%A8%E2%88%A0AOB%E5%9C%B0%E4%B8%A4%E8%BE%B9OA%E5%92%8COB%E4%B8%8A%E5%88%86%E5%88%AB%E5%8F%96OM%3DON%2CMC%E2%8A%A5OA%2CNC%E2%8A%A5OB%2CMC%E4%B8%8ENC%E4%BA%A4%E4%BA%8EC%E7%82%B9.%E6%98%AF%E8%AF%B4%E6%98%8E%E5%B9%B4%EF%BC%9A%E2%88%A0MOC%3D%E2%88%A0NOC.)
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