To: **beaversmom**

Pizza pi for me tomorrow.

I’ll round up next year just to party for it one more time.

I frequently use pi in design calculations.

Most people seem to know pi is 3.14... but have no idea that it solves an actual equation or how it’s derived.

11 posted on **03/13/2015 4:36:08 PM PDT** by treetopsandroofs
(Had FDR been GOP, there would have been no World Wars, just "The Great War" and "Roosevelt's Wars".)

To: **treetopsandroofs**

"Most people seem to know pi is 3.14... but have no idea that it solves an actual equation or how it’s derived."

Most people over the age of 50, maybe, but I wouldn't bet that more than 20% of the man-on-the-street could tell you what the value of pi is. As for how it's derived, you'd probably have to be a professional mathematician to do a good job of explaining it. All I know is that it's used in measuring the circumference of a circle by multiplying it by the diameter of the circle (I think). And I think pi times radius squared equals the area of a circle. But my geometry class was about 50 years ago, so don't shoot me if I'm wrong.

Most people over the age of 50, maybe, but I wouldn't bet that more than 20% of the man-on-the-street could tell you what the value of pi is. As for how it's derived, you'd probably have to be a professional mathematician to do a good job of explaining it. All I know is that it's used in measuring the circumference of a circle by multiplying it by the diameter of the circle (I think). And I think pi times radius squared equals the area of a circle. But my geometry class was about 50 years ago, so don't shoot me if I'm wrong.

To: **treetopsandroofs**

Pi is not the solution to an equation, i.e., it is not the root of a polynomial with rational coefficients. It is a so-called "transcendental number." It is calculated by successive approximation, summing a series. When digital computers were first introduced, one of the first applications was calculating Pi to several hundred decimal places, simply "because."

40 posted on **03/14/2015 1:39:44 PM PDT** by JoeFromSidney
(Book RESISTANCE TO TYRANNY, available from Amazon.)

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