Question 1144359
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The center of a circle is the mid-point of a diameter.  Use the mid-point formulas:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  x_m\ =\ \frac{x_1\ +\ x_2}{2}]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \  y_m\ =\ \frac{y_1\ +\ y_2}{2}]
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
{{n}\choose{r}}
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