document.write( "Question 1021170: :- X and Y are centers of circles of radius 9 cm and 2 cm and XY = 17cm. Z is the centre of a circle of radius 4 cm, which touches the above circles externally. Given that ∠XZY=90o, write an equation in r and solve it for r.
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Algebra.Com's Answer #637000 by Fombitz(32388) $\"\"$ $\"About$

You can put this solution on YOUR website!
What is $\"r\"$ ?
\n" ); document.write( "The way you have the problem set up,
\n" ); document.write( " $\"XZ=13\"$
\n" ); document.write( " $\"YZ=6\"$
\n" ); document.write( " $\"XY=17\"$
\n" ); document.write( "but they don't form a 90 degree angle since the sides don't follow the Pythagorean theorem.
\n" ); document.write( " $\"XZ%5E2%2BYZ%5E2=XY%5E2\"$
\n" ); document.write( "Please clarify and repost. \n" ); document.write( "

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