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
Choices
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.
Choices
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 
