IMO Mathematics Olympiad Class 9: Questions 147  152 of 919
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Question number: 147
» Lines, Angles and Quadrilaterals
Question
How many sides does a regular polygon have, each angle of which is of measure 150˚?
Choices
Choice (4)  Response  

a.  16 

b.  18 

c.  12 

d.  17 

Question number: 148
Question
If the product of two surds is a rational number, then each one of them is called the ________ of the other________
Choices
Choice (4)  Response  

a.  Negative 

b.  Rationalizing factor 

c.  Conjugate surd 

d.  Binomial surd 

Question number: 149
» Lines, Angles and Quadrilaterals
Question
If two complementary angles are in the ratio 4: 11, then the angles are________
Choices
Choice (4)  Response  

a.  56˚, 34˚ 

b.  61˚, 29˚ 

c.  24˚, 66˚ 

d.  30˚, 60˚ 

Question number: 150
» Lines, Angles and Quadrilaterals
Question
In a parallelogram, the sum of the angle bisectors of two adjacent angles is ________
Choices
Choice (4)  Response  

a.  45˚ 

b.  60˚ 

c.  90˚ 

d.  30˚ 

Question number: 151
» Lines, Angles and Quadrilaterals
Question
The value of x in the given figure is ________
Choices
Choice (4)  Response  

a.  118˚ 

b.  20˚ 

c.  72˚ 

d.  223˚ 

Question number: 152
» Lines, Angles and Quadrilaterals
Question
In the figure, if , then x = ________
Choices
Choice (4)  Response  

a.  45˚ 

b.  60˚ 

c.  29˚ 

d.  30˚ 
