Updated

Today, March 14 is a day to celebrate the number pi, the circle's circumference to its diameter --which is approximately 3.14. While it's unclear who actually invented pi, Welsh mathematician William Jones was the first to express pi as a ratio in 1707.  But pies have been around long before that --approximately in 9500 BC.

So, let's celebrate this auspicious day with something that feeds our mind and body.

Here are 7 outrageously delicious pies to dish up for your favorite math geek -- or anyone else who likes pies.

1. No-bake Snickers Pie

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Who doesn't love the perfect equation of Snickers and not having to slave over a hot stove?

Click here for the recipe.

2. Half-Moon Fried Apple Pies

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A half moon is kind of like a half circle, right?

Click here for the recipe.

3. Nutella Cookies and Cream Pie

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Cause I bet even William Jones loved Nutella.

Click here to see the recipe.

4. Oreo Crusted Brownie Pie with Cream Cheese Icing

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Science has allowed for the creation of a robot that actually dunks your Oreos for you.  But it's still fun to crush them up yourself.

Click here to see the recipe. 

5. Cranberry Apple Pie

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A perfect balance of tart and sweet.

Click here for the recipe.

6. Blueberry Goat Cheese Pie

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Blueberries and goat cheese have infinite possibilities, but is best is pie.

Click here for the recipe.

7. Pecan Pie

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It's delicious sweet.  What's not to love.

Click here for the recipe.