山东省德州市2019年中考数学一轮复习第六章圆第19讲圆的有关性质(过预测)练习.doc

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1第 19 讲 圆的有关性质考向 圆的有关性质12018临沂如图,在 ABC 中, A60, BC5cm.能够将 ABC 完全覆盖的最小圆形纸片的直径是 cm.10 33第 1 题图 第 2 题图2如图,在 ABC 中, AB AC10,以 AB 为直径的 O 与 BC 交于点 D,与 AC 交于点 E,连接 OD 交 BE 于点 M,且 MD2,则 BE 长为 8 3.如图,已知 ABC 内接于 O,且 AB AC,直径 AD 交 BC 于点 E, F 是 OE 上的一点,使CF BD.(1)求证: BE CE;2(2) 试判断四边形 BFCD 的形状,并说明理由;(3) 若 BC8, AD10,求 CD 的长3

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