IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 119  124 of 929
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Question number: 119
» Lines, Angles and Quadrilaterals
Question
In the given figure, and . Then ∠URS is________
Choices
Choice (4)  Response  

a.  140˚  
b.  120˚  
c.  160˚  
d.  190˚ 
Question number: 120
» Lines, Angles and Quadrilaterals
Question
If l, m, n are three parallel lines and the transversals t1 and t2 cut the lines l, m, n at the points A, B, C and P, Q, R as shown in the figure, then________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 121
» Lines, Angles and Quadrilaterals
Question
The angles of quadrilateral are in the ratio . All angles of a quadrilaterals are________
Choices
Choice (4)  Response  

a.  72˚, 36˚, 108˚, 144˚  
b.  36˚, 60˚, 20˚, 156˚  
c.  145˚, 20˚, 30˚, 60˚  
d.  108˚, 144˚, 45˚, 15˚ 
Question number: 122
» Lines, Angles and Quadrilaterals
Question
In figure PQ, RS and TU are three lines concurrent at A. If ∠PAU = 6y˚, ∠QAS = 4y˚ and ∠RAT = 2y˚, the value of y is________
Choices
Choice (4)  Response  

a.  15  
b.  20  
c.  25  
d.  30 
Question number: 123
» Lines, Angles and Quadrilaterals
Question
The complementary angle of an angle is one fourth of itself. Then the angle of its complement are________
Choices
Choice (4)  Response  

a.  45˚, 45˚  
b.  72˚, 18˚  
c.  55˚, 35˚  
d.  60˚, 30˚ 
Question number: 124
» Lines, Angles and Quadrilaterals
Question
The angles of a triangle are in the ratio . The triangle is ________
Choices
Choice (4)  Response  

a.  Acute  
b.  Isosceles  
c.  Obtuse  
d.  None of the above 