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Types of Angles
Describing different types of angles
12
Mathematics
9th Grade
03/05/2013
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Term
[image]
 Definition
Acute Angle
Term
[image]
 Definition
Obtuse Angle
Term
[image]
 Definition
Right Angle
Term
[image]
 Definition
Reflex Angle
Term
[image]
 Definition

Angles on a straight line

add up to 180°

 

(Supplementary)
Term
[image]
 Definition

Angles at a point 

add up to 360°

 
Term
[image]
 Definition

Vertical Opposite

angles are equal

 

a° = b°

 
Term
[image]
 Definition

Angles of a Δ

 

add up to 180°
Term
[image]
 Definition

(Parallel Lines)

 

Alternate Angles

are equal 

 

 
Term
[image]
 Definition

(Parallel Lines)


Corresponding Angles

are equal
Term
[image]
 Definition

(Parallel Lines)

 

Interior Angles

are supplementary
Term
[image]
 Definition

Exterior Angle of

a Δ

 

d° = a° + c° 

 
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