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幻灯片 1

) √ × √ × 练习三 已知平行四边形ABCD中, ∠1=15°, ∠2=25°,且AB=5cm,AO=2cm,求∠DAB和∠ABC的度数,并找出长度分别为5cm和2cm的线段. A D B C 1 2 解 ...

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幻灯片 1