IMO Level 1 Mathematics Olympiad (SOF) Class 9: Questions 215  218 of 929
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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 
