IMO Mathematics Olympiad Class 9: Questions 179  183 of 919
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Question number: 179
» Lines, Angles and Quadrilaterals
Question
If two complementary angles are in the ratio 13: 5, then the angles are________
Choices
Choice (4)  Response  

a.  15˚, 85˚  
b.  65˚, 25˚  
c.  13 x˚, 5 x˚  
d.  65˚, 35˚ 
Question number: 180
Question
If a right triangle has sides of length 1 and , which of the following could be the length of the remaining side?

1


Choices
Choice (4)  Response  

a.  2 Only  
b.  1 And 3 Only  
c.  1 Only  
d.  3 Only 
Question number: 181
Question
If and x and y are positive integers, then y could be which of the following?
Choices
Choice (4)  Response  

a.  3  
b.  5  
c.  4  
d.  2 
Question number: 182
» Lines, Angles and Quadrilaterals
Question
In the figure , form a linear pair and . Then a, b respectively are________
Choices
Choice (4)  Response  

a.  70˚, 100˚  
b.  80˚, 120˚  
c.  110˚, 70˚  
d.  120˚, 80˚ 
Question number: 183
Question
All the three quadrilaterals ADEC, ABIH and BCGF are squares and if the area of and area of , then find the area of BCGF?
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 
