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None. A circle has no angles: it comprises a smooth curve.
it has no right angles because it has a curved line all around! Simple's!
A circle.
Just the one and it is its radius when at right angles to the semi-circle's centre
It has no Right angels because it has a curving line all around! Simples!
None. A circle has no angles: it comprises a smooth curve.
There are many angles inside a circle. You have inscribed angles, right angles, and central angles. These angles are formed from using chords, secants, and tangents.
it has no right angles because it has a curved line all around! Simple's!
A circle.
Just the one and it is its radius when at right angles to the semi-circle's centre
Infinite angles. If you are referring to degrees then the answer is 360, but if the question is angles I can get as many angles as I want inside a circle.
It has no Right angels because it has a curving line all around! Simples!
No.
A circle.! or sphere
A circle does not have any angles.
A semicircle itself does not have any right angles; it is a half-circle. However, if you consider the angle formed at the endpoints of the diameter when a line is drawn to any point on the arc of the semicircle, that angle is a right angle (90 degrees). Thus, while the semicircle itself has no right angles, it can form right angles with lines drawn to points on its arc.
In one complete revolution, there are four right angles (90 degrees each), corresponding to the four quadrants in a circle. Therefore, in two revolutions, there are a total of eight right angles.