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Because there are 360 degrees around a circle.

Q: Why do all circles have the same number of degrees on a protractor?

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A protractor is one such instrument. Navigational aides that do the same include compasses and sextants.

For each drawing . . .-- Draw a small number of circles.-- Draw that same number of circles again.-- Draw that same number of triangles three times.To create a different drawing, do exactly the same thing,but start out with a different small number.

If the circles have the same radius then an infinite number, and if they do not, then none.

A "protractor" is a device that can be used to draw angles of a specified size, or measure the size of unknown angles, in the same way that a "ruler" is used to do the same thing with lines.

same measure ... number of degrees

Related questions

A protractor is one such instrument. Navigational aides that do the same include compasses and sextants.

For each drawing . . .-- Draw a small number of circles.-- Draw that same number of circles again.-- Draw that same number of triangles three times.To create a different drawing, do exactly the same thing,but start out with a different small number.

Geometry teaches there are an infinite number of semi-circles for a sphere. Hence in the grid system that creates the longitude lines that form semi-circles, it becomes the same as what is taught in geometry = infinite number. If you limit yourself to using a llimited definition to units of whole degrees, then 360 semi-circles. However, I suspect that the answer you need is Infinite.

Circles with the same radius are congruent circles.

If the circles have the same radius then an infinite number, and if they do not, then none.

Circles in the same plane with the same center are concentric circles.

Yes, it is. Circles that are in the same plane and having the same center are called congruent circles.

Yes, except that the larger protractor should give a greater degree of precision.

The equator is the line of zero latitude, and it circles the 'middle' of the earth. For every latitude number between zero and 90 degrees, there are two lines with the same number ... one north of the equator and one south of it.

Concentric circles are circles with the same common centre.

A "protractor" is a device that can be used to draw angles of a specified size, or measure the size of unknown angles, in the same way that a "ruler" is used to do the same thing with lines.

same measure ... number of degrees