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In the learning process, often encounter the
situation of drawing circle,The previous round
is usually measured with a rulerThe length,
and then use your compasses to draw a circle.
Compasses rulerThe design of the ruler and
compasses together,By moving the dicing position,
to set the radius of the circle.. The thimble, the
hole in the zero scale. penPut in the scribing
hole, rotate, draw a circle.