Types Of Angles - Definition with Examples

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Types of Angles

Angle

If two lines meet at a point, then the angle between them is the amount of turn, in degrees, that is needed around the point of intersection, to make the lines the same. 

Angle

Angles are measured in degrees, a complete whole turn is 360º as shown.

360 Degree Angle

Different types of angles

Straight angle: It is one-half of a whole turn, and is the same as the angle made by rays going in opposite directions. The measure of the angle is 180º. Some examples are shown below:

Different Types of Angles

Right angle: It is one-quarter of a whole turn and is the same as the angle made by a horizontal line and vertical line. The measure of the angle is 90º. Some examples are shown below:

Right Angle

Acute angles: The angles that lie between 0º and 90º are called acute. Some examples are shown below:

Acute Angle

Obtuse angles: The angles that lie between 90º and 180º are called obtuse. Some examples are shown below:

Obtuse Angles

Reflex angles: The angles that lie between a straight angle (180º) and a whole turn (360º) are called reflex angles. Some examples are shown below:

Reflex Angles

 

Application of angles 

We see angles almost everywhere in our day to day life. For example, the angle made by the hands of a clock, the angle made by two intersecting roads, and angles made by blades of a fan. We also use angles for navigation of planes and ships.

  Fun Facts

  • Angulus is the Latin word from which the word angle is derived.

 

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