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A semi-circle covers an angle of 180 degrees.
It can be any angle above zero and below 180 degrees. When it becomes 180 degrees then the two side will be a straight line. It is also defined as the included angle of a circular sector.
An angle can have up to 180 degree's. A circle can have up to 360 degrees. An angle with 180 degrees is a straight line. If you went any farther than it would change into a 179 degree angle, and so on.
no... a straight line is a 180 degrees half circle.
An angle of 180 degrees is a straight angle, a straight line.