IMO Mathematics Olympiad (SOF) Class 10: Questions 444  447 of 958
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Question number: 444
» Triangle, Circle & Constructions
Question
Given below are the steps of construction of a pair of tangents to a circle of radius 4 cm from a point on the concentric circle of radius 6 cm. find which of the following step is wrong?

Step I: Take a point O on the plane paper and draw a circle of radius . Also, draw a concentric circle of radius .

Step II: Find the midpoint A of OB and draw a circle of radius . Suppose this circle intersects the circle of radius 4 cm at P and Q.

Step III: Join BP and BQ to get the desired tangents.
Choices
Choice (4)  Response  

a.  (2) and (3) 

b.  (1) and (2) 

c.  Only (2) 

d.  Only (1) 

Question number: 445
Question
Points are joined to form which shape?
Choices
Choice (4)  Response  

a.  Pentagon 

b.  Snip single corner Rectangle 

c.  Chord 

d.  Snip round corner Rectangle 

Question number: 446
Question
Find the area of the quadrilateral, the coordinates of whose angular points taken in order are.
Choices
Choice (4)  Response  

a.  22 

b.  25 

c.  28 

d.  24 

Question number: 447
Question
The values of t, if the area of the pentagon ABCDE be sq. units where are ________
Choices
Choice (4)  Response  

a.  1,99 

b.  1,89 

c.  1,100 

d.  1,100 
