(江西专用)2019中考数学总复习第二部分专题综合强化专题二创新作图题类型1针对训练.doc

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1、1第二部分 专题二 类型一1(2018江西模拟)如图,已知 C为 AB的中点,分别以 AC, BC为边,在 AB的同侧作等边 ACE与等边 BCD,连接 BE,请仅用无刻度的直尺按下列要求作图(保留作图痕迹,不写作法)(1)在图 1中,作出 AE的中点 P;(2)在图 2中,过点 C作 AE的垂线 l.解:(1)如答图 1,点 P即为所求(2)如答图 2,直线 l即为所求2(2018吉安模拟)根据下列条件和要求,仅使用无刻度的直尺画图,并保存画图痕迹(1)如图 1, ABC中, C90,在三角形的一边上取一点 D,画一个钝角 DAB;(2)如图 2, ABC中, AB AC, ED是 ABC的

2、中位线,画出 ABC 中 BAC的角平分线解:(1)如答图 1, DAB即为所求(2)如答图 2, AF即为 BAC的角平分线3(2018江西师大附中模拟)在 ABE中,点 C, D分别为 AE, BE的中点,请仅用无刻度的直尺按要求作图(不写作法,保留作图痕迹)(1)如图 1, AE BE,作出 AB的垂线;2(2)如图 2, AE BE,作出 BE的平行线 l.解:(1)如答图 1,直线 EM即为所求(2)如答图 2,直线 l即为所求4(2018鹰潭模拟)请仅用无刻度的直尺按要求作图(不写作法,保留作图痕迹)(1)如图 1, AD, BE是 ABC的角平分线,且相交于点 O,作出 C的平分

3、线;(2)如图 2, AC与 BD相交于点 O,且 DAO BAO CBO ABO,作出 AOB的平分线解:(1)如答图 1, CF即为所求(2)如答图 2, OF即为所求5(2018新余模拟)如图, C, D是线段 AB的三等分点,分别以 AC, CD, DB为边向AB上方作等边三角形,请仅用无刻度的直尺完成下列作图(不写作法,保留作图痕迹)(1)在图 1中,作 AB的中点 P;(2)在图 2中,作一个矩形解:(1)如答图 1(或答图 2,3),点 P即为所求3(2)如答图 4,矩形 MCNF即为所求(答案不唯一)6(2018萍乡模拟)请仅用无刻度的直尺,根据下列条件分别在图 1和图 2中画出BC的垂直平分线(保留作图痕迹,不写作法)(1)如图 1, ABC 是以 BC为底边的等腰三角形,点 D为 ABC 内一点, BD CD;(2)如图 2, AB AC, E, F分别为 AB, AC的中点解:(1)如答图 1, AE即为所求(2)如答图 2, AG即为所求

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