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A compass perhaps?
Geometrical compass To draw a perfect circle, and another compass for determining directions
A compass is used to construct a perfect circle of 360 degrees.
The best tool to locate the center of a circle would be a compass. By placing the compass on the edge of the circle and drawing an arc, then repeating this process from another point on the circle, the intersection point of the arcs will give you the center of the circle.
A Staedtler compass (a typical example of a drawing compass) has a lead fastened in one arm to draw the outline of a circle. A metal point fastened in the second arm is pressed lightly on the paper on which the compass then pivots.
For drawing a circle.
A compass perhaps?
Geometrical compass To draw a perfect circle, and another compass for determining directions
You use a compass to draw an accurate circle.
A compass is used to construct a perfect circle of 360 degrees.
The best tool to locate the center of a circle would be a compass. By placing the compass on the edge of the circle and drawing an arc, then repeating this process from another point on the circle, the intersection point of the arcs will give you the center of the circle.
Compass. Needle point with adjustable gauge and pencil holder.
It is the radius
A Staedtler compass (a typical example of a drawing compass) has a lead fastened in one arm to draw the outline of a circle. A metal point fastened in the second arm is pressed lightly on the paper on which the compass then pivots.
The radius
That's going to become the 'radius' of the circle you draw.
It is an instrument that tells you which direction is north, or a tool for drawing a circle. It can also mean range.