Category : 4th Class
Inclination between two rays having common end point is called angle.
In the above picture, OP and OR are two rays which have a common end point 0. The inclination between the rays OP and OR is called angle POR and it is denoted as . Point O is called vertex and rays OP and OR are called arms of the angle POR.
Features of an Angle
Types of Angles
Angles have been classified into following groups based on their measurement.
An angle which is greater than 0° and smaller than 90° is called acute angle
An angle of exactly 90° is called right angle .
An angle which is greater than 90° and smaller than 180° is called obtuse angle
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