2019年秋八年级数学上册第1章全等三角形1.3探索三角形全等的条件1.3.1尺规作图随堂检测(新版)苏科版.docx

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11.3.1 尺规作图1尺规作图的画图工具是( )A刻度尺、圆规 B三角板、量角器 C直尺和量角器 D无刻度的直尺和圆规2.下列各作图题中,可直接用“边边边”条件作出三角形的是( )A.已知腰和底边,求作等腰三角形B.已 知两条直角边,求作直角三角形C.已知高,求作等边三角形D.已知腰长,求作等腰三角形3.利用直尺和圆规作一个角等于已知角的示意图如图,那么说明AOB=AOB的依据是 。4.如图,已知 和().求作AOB,使AOB=2-课堂小结通过本节课的学习 在小组内谈一谈你的收获,并记录下来:我的收获_2参考答案1. D2A3 SSS4作法:(1)作COD=(2)以射线 OD 为边,在COD 外部作DOA=(3)以射线 OC 为一边,在COD 内部作BOC=.则A OB 就是所求作的角.如图:3

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