International Maths Olympiad Forum By SOF Olympiad Trainer - Page 290

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Subject :IMO    Class : Class 8

Which of the following steps is INCORRECT while constructing a rhombus ABCD, given that AC = 8 cm and BD = 6 cm?
Step 1 :Draw AC = 8 cm.
Step 2 :Draw PQ, the perpendicular of AC. PQ intersects AC at point O.
Step 3 :With O as centre and radius equal to 3 cm, drawn an arc cutting OP at D.
Step 4 :With O as centre and radius equal to 3 cm, draw another arc cutting OQ at B.
Step 5 :Join AB, BC, CD and DA.

A Step 2 only
B Step 3 only
C Step 4 only
D Both Step 2 and Step 5


how is step 2 wrong ?

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
The correct answer is option A as step 2 states that a perpendicular is to be drawn , but a perpendicular bisector is to be drawn .

Ans 3:

Class : Class 8
but why dont u draw ac

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 10
FIGURE IN OPTION A AND B IS NOT VISIBLE

Ans 3:

Class : Class 8
in the solution figure D is shown but the website says option A is correct even though its absolutely wrong

Ans 4:

Class : Class 8
Answer definitely cannot be c or d. So , the only possible options are a and b .However , they are not visible . Kindly look into this matter.

Ans 5:

Class : Class 9
Exactly, the A and B figures are not visible.. they are so tiny

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 4
Answer is B)

Ans 2:

Class : Class 5

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Subject :IMO    Class : Class 7

Ans 1:

Class : Class 8
Same here!!

Ans 2:

Class : Class 10
CONGRATULATE. WHAT IS YOUR INTERNATIONAL RANK?

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Subject :IMO    Class : Class 5

Ans 1:

Class : Class 5
Can you share all steps

Ans 2:

Class : Class 5

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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 6

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Subject :IMO    Class : Class 8

Ans 1:

Class : Class 8

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Subject :IMO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

(D): 98 - 35 + 17 = 80


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Subject :IMO    Class : Class 6

Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

Ans 3:

Class : Class 5
Ans is A

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Subject :IMO    Class : Class 8

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