Posted by Priyanka on Monday, January 14, 2013 at 8:45am.
The radius of a circle is 8cm, and the length of one of its chords is 12cm. Find the distance of the chord from the centre.

Maths  Reiny, Monday, January 14, 2013 at 9:10am
You can create a rightangled triangle
with hypotenuse = 8 , (the radius)
base of 6 , (1/2 your chord)
and the height unknown, call it x
x^2 + 6^2 = 8^2
x^2 = 28
x = √28 = 2√7
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