IMO Mathematics Olympiad Class 9: Questions 203  207 of 919
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Question number: 203
» Lines, Angles and Quadrilaterals
Question
In the given figure, , and , find
Choices
Choice (4)  Response  

a.  50˚ 

b.  45˚ 

c.  55˚ 

d.  60˚ 

Question number: 204
» Lines, Angles and Quadrilaterals
Question
Ray OE bisects ∠AOB and OF is the ray opposite OE, then ∠FOB = ________
Choices
Choice (4)  Response  

a.  ∠BOE 

b.  ∠FOA 

c.  ∠AOE 

d.  ∠FOE 

Question number: 205
» Lines, Angles and Quadrilaterals
Question
In the figure, p is greater than q by one third of a right angle. Find the values of p and q.
Choices
Choice (4)  Response  

a.  p = 115˚ and q = 65˚ 

b.  p = 75˚ and q = 105˚ 

c.  p = 105˚ and q = 75˚ 

d.  p = 65˚ and q = 115˚ 

Question number: 206
» Lines, Angles and Quadrilaterals
Question
If two supplementary angles are in the ratio 13: 5, then the angles is ________
Choices
Choice (4)  Response  

a.  125˚, 55˚ 

b.  145˚, 35˚ 

c.  130˚, 50˚ 

d.  120˚, 60˚ 

Question number: 207
» Lines, Angles and Quadrilaterals
Question
In the given figure, ∠COD is a right angle. ∠AOC and ∠BOD are in the ratio of 3: 2, thus ∠BOD measures________
Choices
Choice (4)  Response  

a.  50˚ 

b.  40˚ 

c.  54˚ 

d.  36˚ 
