IMO Mathematics Olympiad (SOF) Class 9: Questions 350  354 of 919
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Question number: 350
Question
Which of the points A (0, 6), B (2, 4), C (4, 0), D (0, 2), E (0, 5), F (4, 4) do lie on the Yaxis?
Choices
Choice (4)  Response  

a.  B and E only 

b.  A, D, E 

c.  A and D only 

d.  A, F, E 

Question number: 351
Question
In triangle ABC, the altitude from A to BC meets BC at D, and the altitude from B to CA meets AD at H. if , and , if then the length of HD is ________
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 352
» Lines, Angles and Quadrilaterals
Question
Two regular polygons are such that the ratio between their no. of sides is 1: 2 and the ratio of measures of their interior angles is 4: 7. Find the number of sides of each polygon
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 353
Question
The area of a quadrilateral JKLM, in which, is an equilateral triangles of side 20 cm and is________.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 354
Question
A1 is a circle of radius 8 cm, A2 is a circle of radius 12 cm. Shivangi wants the two circles to touch tangentially. She knows that there are two possibilities for the distance between their centres. What are these two distances?
Choices
Choice (4)  Response  

a.  5 cm and 19 cm 

b.  4 cm and 20 cm 

c.  16 cm and 8 cm 

d.  12 cm and 4 cm 
