Did you know that one half turn is 180°? If the straight line or half turn is divided into two angles, and we know one of the angles, we can work out the other. Here 120° + 60° = 180° If we just had ...
Angles close angleAn angle is formed when two straight lines meet. around a point add up to 360°. This fact can be used to calculate missing angles. \(c\) and \(30^\circ\) are called vertically ...
IN geometrical discussions, such as arise out of a great variety of physical problems, it is frequently necessary to refer to an acute or obtuse angle A as being equal to another acute or obtuse angle ...
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