Supplementary Angles


 
 
Concept Explanation
 

Supplementary Angles

When the sum of two angles is 180° then they are said to be Supplementary Angles.

Two Angles are Supplementary when they add up to 180 degrees

 

supplementary angles 40 and 140

Illustration: Find supplementary angle of 43°.

Solution: Let the angle be x:

x + 43 = 180:   

x = 180 - 43 = 137°

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Sample Questions
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Question : 1
Column 1 Column 2
A) Complementary angle p) 180^0<Angle <360^0
B) Reflex angle q) Angle =100^0
C) Obtuse triangle r) 0<0<Angle <90^0
D) Supplementary angle s) 35^0,55^0
  t) Angle =240^0
  u) 140^0,40^0

 

Right Option : C
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Explanation
Question : 2

Consider the following statements:

When two straight lines intersect:

1) adjacent angles are complementary

2) adjacent angles are supplementary

3) opposite angles are equal

4) opposite angles are supplementary

Choose which statements are correct.

Right Option : B
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Explanation
Question : 3

If the supplement of an angle is three times its complement, then angle is  _________________

Right Option : D
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Explanation
 
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