So, three right angles make up three quarters of a full turn… An angle is a measure of a turn, measured in degrees or °. There are 360° in a full turn. You can find out the size of an angle ...

You know that one of the angles is 90°, represented by the right angle symbol, and another is 35°. And you also know that angles on a straight line add up to 180°. To find the unknown angle ...