__Different Types of Angles__
*Beautiful and useful blog on different types of angles, useful for the students of 5th onword . Complete knowledge about different types of angles in mathematics*

**Different Types of Angles**

**Zero Angle:- Angle of 0**^{o} is called zero angle.

**Acute angle :- Angle greater than 0**^{o} but less
than 90^{o} is called acute angle.

**Right Angle:- Angle of 90**^{o} is called right angle.

**Obtuse Angle:- Angle greater than 90**^{o} but less
than 180^{o} is called obtuse angle.
**Straight Angle :- Angle of 180**^{o} is called
straight angle.

**Different Types of Angles**

**Reflex angle :- Angle greater than 180**^{o} but less
than 360^{o} is called reflex angle.

**Complete angle:- Angle of 360**^{o} is called complete
angle.

**Linear Pair of Angles:- **

**When sum of two adjacent angles is ****180**^{o}, then pair of angles is called
a linear pair of angles .

**Adjacent Angles:- **
**Two angles with one common arm are called
adjacent angles.**

**Complementary Angles :- **
**If sum of any two angles is 90**^{o}
then angles are called complementary angles.
**Different Types of Angles**

**Supplementary Angles:-**

** If sum of any two angles is 180**^{o}
then angles are called supplementary angles.

**Vertically Opposite Angles:- **

**When two lines intersect each other then vertically opposite angles are
formed. Vertically opposite angles are always equal.**

**Different Types of Angles**

__Parallel Lines and Angles__

**When two or more parallel lines are intersected by a
transversal then :-**

**Alternate angles are equal:- \[\angle 3=\angle 5,\: \: \: \angle 4=\angle 6\]**
**Corresponding angles are equal:- \[\angle 1=\angle 5,\: \: \: \angle 2=\angle
6,\: \: \: \angle 3=\angle 7,\:\: \: \angle 4=\angle 8\]**
**Alternate Exterior Angles are Equal:- \[\angle 1=\angle 7,\: \: \: \angle 2=\angle
8\]**
** Co - interior Angles are Supplementary :- \[\angle
4+\angle 5=180^{o},\: \: \: \angle 3+\angle 6=180^{o}\]**
**Vertically Opposite angles are equal:- \[\angle
1=\angle 3,\: \: \angle 2=\angle 4,\: \: \angle 5=\angle 7,\: \: \angle
6=\angle 8\]**
**Different Types of Angles**

**Sum of three angles of a triangle is 180**^{o}

**Exterior angle of a triangle is equal to the sum of interior opposite angles.**

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