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.[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif][/FONT]
[FONT=Verdana, Arial, Helvetica, sans-serif]![[IMG]](proxy.php?image=http%3A%2F%2Fwww.archimedes-lab.org%2Fim_maths%2Fmon_p_sept_2k8_SM.gif&hash=dcc8a3f11d3127c02ff1b2a2208a1deb)
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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.[/FONT] [FONT=Verdana, Arial, Helvetica, sans-serif][/FONT]
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![[IMG]](proxy.php?image=http%3A%2F%2Fwww.archimedes-lab.org%2Fim_maths%2Fmon_p_sept_2k8_SM.gif&hash=dcc8a3f11d3127c02ff1b2a2208a1deb)
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