Angles

ANGLE

Two rays starting from a common point form an angle.

       i.            Acute angle:

An angle whose measure is greater than 0⁰ but less than 90⁰ is called an actue angle.

    ii.            Right angle:

An angle whose measure is 90⁰ is called a right angle.

 iii.            Obtuse angle:

An angle whose measure is greater than 90⁰ and less than 180⁰ is called an obtuse angle.

 iv.            Straight angle:

When the ray of an angle are opposite rays forming a straight line, the angle thus formed is a straight angle and its measure is 180⁰.

    v.            Reflex angle:

An angle whose measure is more than 180⁰ but less than 360⁰ is called a reflex angle.

 vi.            Complete angle:

The angle formed one complete circle that is 360⁰. Such an angle is called a complete angle.