A structure or shape which is formed by two line segments and which is obtained from common Point is known as angle. An angle is formed by joining two rays, which has a joining Point called vertex. There are different types of angle: acute angle, obtuse angle, right angle, straight angle, reflex angle, complete angle.

**Acute angle:**The angle which has a measure between 0 and 90 degrees are called acute angles. We say that the angle formed between our two fingers is called acute angles. Example: The English alphabets A, N, M and many others form an Acute Angle. Also in a clock the distance swapped in less than 15 minutes will form an angle of less than 90 degrees, which we call an acute angle.**Obtuse angle:**The angle which has a measure between 90 and 180 degrees is called an Obtuse Angle. Example: The English alphabet ‘K’ forms an Obtuse Angle. In a clock, in half an hour the minute hand reaches just opposite to the place from where ever it had started i.e, the distance swapped in less than 30 minutes and greater than 15 minutes will form an Obtuse Angle.

**Right angle:**The angle which has a measure of 90 degrees is called a Right Angle. Example: The English alphabet L, T, H forms a Right Angle. Also in a clock the distance covered in 15 minutes is 90 degree, which we call as one quarter.

**Straight angle:**The angle which has a measure of 180 degrees is called a Straight Angle. Example: The angle formed by the straight line forms a Straight Angle. Also in a clock the distance covered in 30 minutes by the minute hand will form a straight angle.

**Complete angle:**The measure of a complete angle is 360 degrees. We say that an angle is complete, if it has completed a round and its measure is 360 degrees. Here the two rays overlap each other. Example: If we look at the clock, it completes its rotation in one hour, and the minute hand reaches the same starting point from where it started in one hour, so it forms a complete angle in the span of one hour.

**Reflex angle:**The angle which has a measure between 180 and 360 degrees are called a Reflex Angle.