Angles on a Straight Line


 
 
Concept Explanation
 

Angles on a Straight Line

Angle on a Straight Line:

Angles on one side of a straight line always add to 180 degrees.

30° + 150° = 180°

When a line is split into 2 and we know one angle, we can always find the other one.

angle 180 degrees

Solved Examples:

Example: We know one angle is 45°, what is the other angle "a" ?

Angle a is 180° − 45° = 135°

   angle 45 degrees

Example: What is angle "b" ?

Angle b is 180° minus the sum of the other angles.

Sum of known angles = 45° + 39° + 24°Sum of known angles = 108°

Angle b = 180° − 108° = 72°

angle b
Sample Questions
(More Questions for each concept available in Login)
Question : 1

Find the measure of angle ZXY in the following figure

Right Option : C
View Explanation
Explanation
Question : 2

Two lines AB and CD intersect at O. if  angle AOC+angle COB+angle BOD=270^0 Then find  angle AOD is ___________________

Right Option : C
View Explanation
Explanation
Question : 3

Find the measure of angle LNM in the following figure.

Right Option : C
View Explanation
Explanation
 
 
 
Related Videos
Language - English
Language - English
Language - English

Language - English
Language - English


Students / Parents Reviews [10]