Triangles and Circles (IMO Mathematics Olympiad Class 9): Questions 38  41 of 79
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Question number: 38
» Triangles and Circles
Question
An exterior angle of a triangle is 139˚ and one of the interior opposite angle is 49˚. Then the other two angles of a triangle are
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 39
» Triangles and Circles
Question
In the adjoining figure, the value of is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 40
» Triangles and Circles
Question
C1 is a circle of radius 6 cm, C2 is a circle of radius 8 cm. Jyoti wants the two circles to touch tangentially. She knows that there are two possibilities for the distance between their centers. What are these two distances?
Choices
Choice (4)  Response  

a.  6 cm and 8 cm 

b.  2 cm and 14 cm 

c.  3 cm and 4 cm 

d.  2 cm and 8 cm 

Question number: 41
» Triangles and Circles
Question
The point concurrency of medians of a triangle is called ________.
Choices
Choice (4)  Response  

a.  Incenter 

b.  Centroid 

c.  Orthocenter 

d.  Circumcenter 
