已知AB=5cm,BC=2cm,点O是线段AC的中点O,求线段OB的长.注意只求改编题!(2)如图,已知∠AOB=64º,∠BOC=46º,OD是∠AOC的平分线,求∠BOD的度数.(3)(1)(2)两小题我们常称为“姊妹题”.请
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![已知AB=5cm,BC=2cm,点O是线段AC的中点O,求线段OB的长.注意只求改编题!(2)如图,已知∠AOB=64º,∠BOC=46º,OD是∠AOC的平分线,求∠BOD的度数.(3)(1)(2)两小题我们常称为“姊妹题”.请](/uploads/image/z/3527174-38-4.jpg?t=%E5%B7%B2%E7%9F%A5AB%3D5cm%2CBC%3D2cm%2C%E7%82%B9O%E6%98%AF%E7%BA%BF%E6%AE%B5AC%E7%9A%84%E4%B8%AD%E7%82%B9O%2C%E6%B1%82%E7%BA%BF%E6%AE%B5OB%E7%9A%84%E9%95%BF.%E6%B3%A8%E6%84%8F%E5%8F%AA%E6%B1%82%E6%94%B9%E7%BC%96%E9%A2%98%21%EF%BC%882%EF%BC%89%E5%A6%82%E5%9B%BE%2C%E5%B7%B2%E7%9F%A5%E2%88%A0AOB%EF%BC%9D64%26%23186%3B%2C%E2%88%A0BOC%EF%BC%9D46%26%23186%3B%2COD%E6%98%AF%E2%88%A0AOC%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%2C%E6%B1%82%E2%88%A0BOD%E7%9A%84%E5%BA%A6%E6%95%B0.%EF%BC%883%EF%BC%89%EF%BC%881%EF%BC%89%EF%BC%882%EF%BC%89%E4%B8%A4%E5%B0%8F%E9%A2%98%E6%88%91%E4%BB%AC%E5%B8%B8%E7%A7%B0%E4%B8%BA%E2%80%9C%E5%A7%8A%E5%A6%B9%E9%A2%98%E2%80%9D.%E8%AF%B7)
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