Triangles and Circles (IMO Mathematics Olympiad Class 9): Questions 17  22 of 79
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Question number: 17
» Triangles and Circles
Question
What is the point of concurrency of the perpendicular bisectors in a triangle called ________.
Choices
Choice (4)  Response  

a.  Circumcentre 

b.  Centroid 

c.  Incentre 

d.  Orthocentre 

Question number: 18
» Triangles and Circles
Question
The point of concurrency of the angle bisectors of a triangle is called ________.
Choices
Choice (4)  Response  

a.  Incentre 

b.  Orthocentre 

c.  Centroid 

d.  Circumcentre 

Question number: 19
» Triangles and Circles
Question
From the adjoining figure, the value of x is ________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 20
» Triangles and Circles
Question
Orthocenter of a triangle is the point of concurrency of its ________
Choices
Choice (4)  Response  

a.  Medians 

b.  Altitudes 

c.  Angle bisectors 

d.  Perpendicular bisectors 

Question number: 21
» Triangles and Circles
Question
In the figure, and , then
Choices
Choice (4)  Response  

a.  OR 

b.  PF 

c.  PQ 

d.  EF 

Question number: 22
» Triangles and Circles
Question
An exterior angle of a triangle is 130˚ and one of the interior opposite angle is 45˚. Then the other two angles of a triangle are
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

