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What is an Angle? Before we begin let's remember what we mean by an angle. An angle is a measure of a turn. The angle between two lines is how much you have to turn one of the lines so that it matches up with the other one. If you turn a line all the way round, then it will turn through an angle of 360o ("360 degrees"). We draw a curved line, called an arc, between the two lines to identify the angle. Look at the example opposite.
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