IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 214  219 of 929
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Question number: 214
» Lines, Angles and Quadrilaterals
Question
Diagonals of a rectangle ABCD intersect at O. if , then ∠DCO is ________
Choices
Choice (4)  Response  

a.  70˚  
b.  55˚  
c.  35˚  
d.  110˚ 
Question number: 215
» Lines, Angles and Quadrilaterals
Question
In the given figure, BO, CO is angle bisectors of external angles of △ABC. Then BOC is ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 216
» Lines, Angles and Quadrilaterals
Question
In the figure below, lines XY and MN intersect at O. if and , then are equal to ________
Choices
Choice (4)  Response  

a.  130˚  
b.  90˚  
c.  126˚  
d.  180˚ 
Question number: 217
Question
Triangle PAB is formed by three tangents to circle with center O and , then angle ACB equals ________
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 218
Question
An exterior angle of a triangle is and the measure of the two remote interior angles are 25 degree and degree. x = ________.
Choices
Choice (4)  Response  

a.  24  
b.  29  
c.  20  
d.  25 
Question number: 219
Question
The number of spherical bullets each 0.6 cm in diameter be made out of a rectangular solid is ________
Choices
Choice (4)  Response  

a.  10250  
b.  10200  
c.  10500  
d.  10550 