IMO Mathematics Olympiad Class 9: Questions 249  254 of 919
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Question number: 249
Question
If the altitude of an equilateral triangle is , its area is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 250
Question
The Point identified in figure by the Coordinates (6, 4) is ________
Choices
Choice (4)  Response  

a.  Y 

b.  Z 

c.  W 

d.  X 

Question number: 251
Question
A triangle and a trapezoid are equal in area. They also have the same altitudes. If the base of the triangle is 18 inches, the mean of the parallel sides of the trapezoid is ________
Choices
Choice (4)  Response  

a.  36 inches 

b.  Not obtained from this data 

c.  18 inches 

d.  9 inches 

Question number: 252
Question
The area of an isosceles triangle having base 32 cm and one side 20 cm is________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 253
Question
A circular park of 20 metre diameter has a circular path just inside the boundary of width 1 metre. The area of path is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 254
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 
