IMO Mathematics Olympiad Class 8: Questions 321  325 of 1029
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Question number: 321
» Quadrilaterals and Practical Geometry
Question
In a parallelogram ABCD, if, then the others angles are________.
Choices
Choice (4)  Response  

a.  35, 145, 145 

b.  35, 135, 135 

c.  45, 115, 115 

d.  45, 125, 135 

Question number: 322
» Quadrilaterals and Practical Geometry
Question
The exterior angle of a regular polygon is onefourth of its interior angle. How many sides has the polygon?
Choices
Choice (4)  Response  

a.  8 

b.  10 

c.  4 

d.  12 

Question number: 323
» Quadrilaterals and Practical Geometry
Question
To construct a convex quadrilateral which of the following cases is not correct?
Choices
Choice (4)  Response  

a.  When the lengths of four sides and one diagonal are given 

b.  When the lengths of three sides and the two diagonal given. 

c.  When the lengths of two sides and one angle are given. 

d.  When the lengths of two sides and two included angles are given. 

Question number: 324
» Quadrilaterals and Practical Geometry
Question
ABCD is a quadrilateral. If its diagonals are perpendicular bisectors of each other, then ABCD is________.
Choices
Choice (4)  Response  

a.  Square 

b.  Parallelogram 

c.  Rectangle 

d.  Rhombus 

Question number: 325
Question
If a number x is 15 % less than another number y and y is 15 % more than 110, then x is equal to________.
Choices
Choice (4)  Response  

a.  107.525 

b.  120 

c.  109.725 

d.  100.25 
