IMO Mathematics Olympiad Class 9: Questions 143  149 of 919
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Question number: 143
» Lines, Angles and Quadrilaterals
Question
If the diagonals of a parallelogram are equal, then it is a ________
Choices
Choice (4)  Response  

a.  Trapezium 

b.  Rectangle 

c.  Rhombus 

d.  Square 

Question number: 144
» Lines, Angles and Quadrilaterals
Question
In the given figure and , then value of x is________.
Choices
Choice (4)  Response  

a.  90˚ 

b.  80˚ 

c.  85˚ 

d.  95˚ 

Question number: 145
Question
Value of
Choices
Choice (4)  Response  

a.  1 

b.  1 

c.  x 

d.  0 

Question number: 146
» Lines, Angles and Quadrilaterals
Question
In the figure , find ________
Choices
Choice (4)  Response  

a.  115˚ 

b.  120˚ 

c.  105˚ 

d.  100˚ 

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˚ 
