Question 1120647
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There are four unshaded right triangles surrounding the shaded quadrilateral.  Calculate the areas of the four triangles, calculate their sum, then subtract that sum from the total area of the square figure.
								
								
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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