IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 105  111 of 929
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Question number: 105
» Lines, Angles and Quadrilaterals
Question
How many sides does a regular polygon have, each angle of which is of measure 108˚?
Choices
Choice (4)  Response  

a.  7  
b.  8  
c.  5  
d.  6 
Question number: 106
» Lines, Angles and Quadrilaterals
Question
DEF is an equilateral triangle for side . A, B and C are midpoints of DE, EF and DF respectively. The area of triangle JKL is (in ) ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 107
» Lines, Angles and Quadrilaterals
Question
In the figure the bisectors of ∠PQR and ∠PRQ intersect each other at O, then ∠QOR is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 108
Question
The expression equals to ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 109
» Lines, Angles and Quadrilaterals
Question
The given figure ABCD is a parallelogram then the values of and are________
Choices
Choice (4)  Response  

a.  70˚, 25˚  
b.  35˚, 60˚  
c.  25˚, 70˚  
d.  55˚, 40˚ 
Question number: 110
» Lines, Angles and Quadrilaterals
Question
The measure of an angle is eight times the measure of its supplementary angle. Then the angles are________
Choices
Choice (4)  Response  

a.  65˚, 45˚  
b.  20˚, 160˚  
c.  63˚, 157˚  
d.  140˚, 60˚ 
Question number: 111
» Lines, Angles and Quadrilaterals
Question
In the figure below, lines WX and YZ intersect at O. if and , then are equal to ________
Choices
Choice (4)  Response  

a.  154˚  
b.  158˚  
c.  150˚  
d.  190˚ 