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  #1 (permalink)
Old 23rd September 2008, 10:35 AM
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Talking Brainy CEans - Now Crack This Puzzle!
Puzzle Source: Mind and Visual Puzzles and Activities that enhance critical, logical, and creative thinking skills, and keep your brain active!

The large circle below circumscribes 2 smaller circles and an isosceles triangle, as shown in the drawing. Points A, O1, O2 and B are aligned. Demonstrate that the segment O3A is perpendicular to the diameter AB.



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Old 23rd September 2008, 03:57 PM
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Default Re: Brainy CEans - Now Crack This Puzzle!
well by visula anyone can say that,do ya need mathematical calculations???
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Old 23rd September 2008, 04:04 PM
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Default Re: Brainy CEans - Now Crack This Puzzle!
Because, what we see is 'not always' what you get.

But in mathematics, 1+1 = 2. We just need our CEans to think!
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Old 29th September 2008, 07:21 PM
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Default Re: Brainy CEans - Now Crack This Puzzle!
OA3 is tangent on Diameter AB.As we know any tangent on diameter making an angle of 90 or we can say its right angle
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