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July 28, 2014

July 28, 2014

Posted by **sushma** on Thursday, February 23, 2012 at 9:03am.

- maths -
**MathMate**, Thursday, February 23, 2012 at 10:00amIf you join the centre of the circle with each end of the chord, you have an isosceles triangle with equal legs of 8cm and base 12cm.

The altitude h(distance of centre from chord) cuts the triangle into two right triangles with half base = 6, and hypotenuse 8.

Using Pythagoras theorem,

h²=8^2-6²=28

h=√28

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