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The question is misguided. You do not use radius only on circles!
The use of concentric circles is most commonly used on a target. Concentric circles are placed around a target in which each concentric circle has the same center.
To draw circles you need to use a compass
They both use circles to represent sets of data.
To calculate properties of circles
you use circles to make stuff round
they use protractors to measure circles
A pair of compasses are use to construct circles and arcs of circles
The question is misguided. You do not use radius only on circles!
The name for the units scientists use for circles are degrees.
There is no definitive answer on how long circles have been in use. The moon and sun are both circles and they have existed since the beginning of time.
To draw a great circle on a sphere, start by defining the diameter as the largest circle that can be drawn on the sphere's surface. For small circles, choose a point on the sphere and draw a circle with that point as the center and the radius less than the sphere's radius. Remember that the center of a small circle lies outside the circle on a sphere's surface.
To use a protractor for circles you find the middle of the circle and you then put the dot on the hole then you measure
The use of quality circles has decreased significantly.
Circles symbolize eternity. They have no beginning and no end.
The use of concentric circles is most commonly used on a target. Concentric circles are placed around a target in which each concentric circle has the same center.
They are said to be concentric circles.