如图,四边形ABCD中,∠F为四边形ABCD的∠ABC的角平分线及外角∠DCE的平分线所在的直线构成的锐角,若设∠A=α,∠D=β;(1)如图①,α+β>180度,试用α,β表示∠F;(2)如图②,α+β<180度,试用α,β
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![如图,四边形ABCD中,∠F为四边形ABCD的∠ABC的角平分线及外角∠DCE的平分线所在的直线构成的锐角,若设∠A=α,∠D=β;(1)如图①,α+β>180度,试用α,β表示∠F;(2)如图②,α+β<180度,试用α,β](/uploads/image/z/2599208-8-8.jpg?t=%E5%A6%82%E5%9B%BE%2C%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E4%B8%AD%2C%E2%88%A0F%E4%B8%BA%E5%9B%9B%E8%BE%B9%E5%BD%A2ABCD%E7%9A%84%E2%88%A0ABC%E7%9A%84%E8%A7%92%E5%B9%B3%E5%88%86%E7%BA%BF%E5%8F%8A%E5%A4%96%E8%A7%92%E2%88%A0DCE%E7%9A%84%E5%B9%B3%E5%88%86%E7%BA%BF%E6%89%80%E5%9C%A8%E7%9A%84%E7%9B%B4%E7%BA%BF%E6%9E%84%E6%88%90%E7%9A%84%E9%94%90%E8%A7%92%2C%E8%8B%A5%E8%AE%BE%E2%88%A0A%3D%CE%B1%2C%E2%88%A0D%3D%CE%B2%EF%BC%9B%EF%BC%881%EF%BC%89%E5%A6%82%E5%9B%BE%E2%91%A0%2C%CE%B1%2B%CE%B2%EF%BC%9E180%E5%BA%A6%2C%E8%AF%95%E7%94%A8%CE%B1%2C%CE%B2%E8%A1%A8%E7%A4%BA%E2%88%A0F%EF%BC%9B%EF%BC%882%EF%BC%89%E5%A6%82%E5%9B%BE%E2%91%A1%2C%CE%B1%2B%CE%B2%EF%BC%9C180%E5%BA%A6%2C%E8%AF%95%E7%94%A8%CE%B1%2C%CE%B2)
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