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A compass

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Q: What Tool is used to make circle?
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What tool is used to draw circles and arcs?

The tool commonly used to draw circles and arcs is called a **compass**. Here are some details about it: **Compass**: This is a drawing instrument that consists of two legs, one with a pointed end to anchor the tool at the center of the circle or arc, and the other with a pencil or pen to draw the circle or arc. The distance between the legs can be adjusted to change the radius of the circle or arc being drawn. Additionally, for more precise or larger scale drawings, other tools and devices might be used: **Beam Compass**: Used for drawing larger circles or arcs, it has a beam or rod with a sliding holder for the pencil or pen. **Protractor**: While not used to draw circles, a protractor is often used to measure angles and can assist in the construction of arcs. **Drafting Tools and Software**: In technical drawing and CAD (computer-aided design), software tools can be used to create precise circles and arcs digitally.


What is an arc in math?

An arc is a portion of the circumference of a circle, and the circumference of a circle is the distance round a circle. So an arc looks like a semicircle, it is part of the circumference. Arcs are often used in constructions, for example if you were asked to draw an angle of 60 degrees without a protractor you would draw arcs following a special method. Arcs are drawn using a tool called a pair of compasses.


What is the type of circle used on a number line when the boundary point is not part of the solution set?

It is an "open" circle. That is, a circle which is not filled in.


What is the unit circle?

The unit circle is a circle that can be used to find trigonometric functions. The equation of the unit circle is x^2 + y^2 = 1. So it is any circle with radius 1.


Is a circle never ending?

No it will meet the starting point, but you can go on the circle to make it never ending.