The radius of a circle is 13 inches and the length of a chord in the circle is 10 inches. How do you find the distance from the center of the circle to the chord?
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r=13inches
so one radius cuts the chord exactly perpendicular bisector and so join one more radius to one end of the chord making it a right angles triangle.
so 13 square =5square+ab square
ab =12inches by Pythagoras theorem.
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