IMO Level 1 Mathematics Olympiad (SOF) Class 7: Questions 657  659 of 1022
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Question number: 657
Question
Match the following.
ListⅠ  ListⅡ 
(A) Circumcenter  (i) The point at which the three angle bisectors of a triangle meet 
(B) Incenter  (ii) The point at which the medians of a triangle meet 
(C) Orthocenter  (iii) The point of intersection of the perpendicular bisector of the sides of a triangle 
(D) Centroid  (iv) The point at which the altitudes of a triangle meet 
Choices
Choice (4)  Response  

 
a. 
 
b. 
 
c. 
 
d. 

Question number: 658
Question
The three angles of a triangle are in the ratio 1: 2: 1, then the greatest angle is ________.
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d. 

Question number: 659
» Practical Geometry  Lines and Angles
Question
The figure below is not drawn to scale. Find .
Choices
Choice (4)  Response  

a. 
 
b. 
 
c. 
 
d.  All of the above 