设M是AC中点,连OM, OC, 直角三角形CMO中,OM是BC的一半,可求出CO, 因此,直角三角形AOC中,可求直径AO
设M是AC中点,连OM, OC, 直角三角形CMO中,OM是BC的一半,可求出CO, 因此,直角三角形AOC中,可求直径AO
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