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360 degrees and 180 degrees respectively

Q: What is the angle of rotation of circle and semicircle?

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order of rotation of a semi circle is 1

Yes. It follows from one of the circle theorems which states that the angle subtended in a semicircle is a right angle.

If the arc is circular, such a figure is a semicircle or half circle.

It is a right angle.

With a central angle of 180° it is a straight line and so the arc is a semi-circle

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order of rotation of semicircle is 1. angle of rotation of semicircle is 360 degree. If you want to find angle of rotation of a shape, then divide 360 from order of rotation of a shape.

A semi-circle, half a circle, by definition is 180 degrees, half of a rotation. A whole circle has a whole rotation, which is 360 degrees.

order of rotation of a semi circle is 1

A semi circle is made up of two right angles.

A semicircle means a half circle.

360 degrees.

Yes. It follows from one of the circle theorems which states that the angle subtended in a semicircle is a right angle.

Semicircle

If the arc is circular, such a figure is a semicircle or half circle.

A right angle triangle will fit into a semicircle.

It is a right angle.

When looking at a curve smaller than a semicircle, you use angle bisectors to find the rest of the circle.