Brainy CEans - Now Crack This Puzzle!

[FONT=Verdana, Arial, Helvetica, sans-serif]Puzzle Source: #-Link-Snipped-#

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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  • sauravgoswami
    well by visula anyone can say that,do ya need mathematical calculations???
  • Kaustubh Katdare
    Kaustubh Katdare
    Because, what we see is 'not always' what you get. 😉

    But in mathematics, 1+1 = 2. 😀 We just need our CEans to think!
  • lovely02525
    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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