The diameter and the circumference of a circle correlate.
直径与有相互关系。
The diameter and the circumference of a circle correlate.
直径与有相互关系。
Please move counterclockwise in a circle!
请逆时针做动。
The envelope of moving line on the hypocycloid plane may be an epicycloid or cardioid and the...
摆线逆动中与动切线成定角直线,其包络是渐开线.
Definition : A strophoid of a circle with the pole O at the centre of the circle and the fixed point P on the circumference of the circle.
在环索线,以心为极点,一点为固定点,所作出图形!
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