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(一)人民教育出版社出版的“初中几何课堂教学计划”(译本)一书中的七年级几何讲授计划第五十一课有下面这样一个作图题:用已知半径作一圆,使这个圆与一已知直线及一已知圆相切.
(1) The 51th lesson of the 7th grade geometry teaching program in the “Junior Geometry Classroom Teaching Plan” published by the People’s Education Press has a drawing title: Make a circle with a known radius so that This circle is tangent to a known straight line and a known circle.