Triangles and Circles (IMO Mathematics Olympiad Class 9): Questions 5  8 of 79
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Question number: 5
» Triangles and Circles
Question
In the given figure, three equilateral triangles have a common vertex then
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 6
» Triangles and Circles
Question
If one leg of an isosceles rightangles triangle is increased by 6 cm and the other leg is increased by 4 cm, then change in area of the triangle is 24 sq. cm. find the length of the leg of the original triangle.
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 7
» Triangles and Circles
Question
Triangle PAB is formed by three tangents to circle with center O and, then angle ACB equals ________
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Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 8
» Triangles and Circles
Question
An exterior angle of a triangle is and the measure of the two remote interior angles are 25 degree and degree. x = ________.
Choices
Choice (4)  Response  

a.  25 

b.  20 

c.  24 

d.  29 
