Question 1141574
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A chord 16 cm long is 6 cm away from the  {{{highlight(cross(centre))}}}  <U>center</U>  of a circle. calculate the radius o
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1)  Make a sketch.


2)  Find a right angled triangle in it.


3)  Then apply the Pythagorean theorem.


<U>ANSWER</U>.  The radius =  {{{sqrt(6^2 + (16/2)^2)}}} = {{{sqrt(6^2 + 8^2)}}} = {{{sqrt(36 + 64)}}} = {{{sqrt(100)}}} = 10 cm.
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Solved.