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The angle between two lines is how much you have to turn one of the lines so it matches up with the other. Tear your paper to show a right angle This is a right angle A right angle is ° or degrees Two right angles make a straight line. Tear your paper to show two right angles joined together This makes ° degrees If you turn all the way round it will turn through an angle of 360°. ¼ turn 90 ° ½ turn ° ° ¾ turn full turn ° The sum of the four angles of a quadrilateral is ° Hint Add the corners of a square.