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Four Tangent Circles (
Posted on 20031020
)
Four circles are tangent to each other and to a triangle that surrounds them, as shown in the figure. Each of the three circles in the corners have a radius of 1 cm. What is the radius of the circle in the middle?
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Submitted by
Bryan
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4.1429
(7 votes)
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My solution
 Comment 4 of 13 
Well I thought that if you got a ruler and measured the actual sizes like that it would be easier.
The little circles had a radius of .7cms and the big one had a radius of 1cm.
So if the small ones are 1cm and the big circle is .3cms bigger,
1 + .3cms
= 1.3cms <my answer (I think I got it wrong)
Posted by
Ashlee
on 20031021 05:18:23
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