There are 360° in a full turn, 180° in a half turn and 90° in a quarter turn. A quarter turn is called a right angle. A right angle is shown by a small square. This fact can be used to calculate ...
There are 360° in a full turn, 180° in a half turn and 90° in a quarter turn. A quarter turn is called a right angle. A right angle is shown by a small square. This fact can be used to calculate ...
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