tmjones03 tmjones03

06-05-2017
Mathematics

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point Z is a point of tangency. Find the value of r

point Z is a point of tangency Find the value of r class=

Respuesta :

06-05-2017

That's kind of blurry but....by the Pythagorean Theorem

(3+r)^2=9^2+r^2

r^2+6r+9=81+r^2

6r+9=81

6r=72

r=12

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