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 Sujet: 4 circles
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 Four tangent circles 2012-10-04 renu pose la question :inside of a circle K of radius length measure R,three circular discs A,Band C each of radius r are placed so that each touches the other two and K . express R in terms of r. in the space between K, A and B , another circular disc D is placed which just touches K, A and B. if the radius is s, show that (6+root3)s=(2+root3)rPenny Nom lui répond. Four circles in a square 2010-06-04 Daniela pose la question :four circles are drawn in a square such that the circles are tangent to each other as shown. find the area of the shaded region. It the goes on to show a diagram with a square and four circles drawn in it. The length of a side of the square is 24. Please help me!Penny Nom lui répond.

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