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During our Pi Day celebrations, we had a small series of posters up on the wall. We received several requests for copies of these posters. Since they were not for sale, we thought the best thing we could do would be to give them away! Here they are. You can download the PDF’s individually by clicking on the pictures of the posters below or as a complete collection from the links at the end of these pages. |
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This is a chart that allows you to compare the total area of a pizza with its diameter. Since A=πr^2, if you double the size of the pizza, you get 4 times the area (and 4 times the food), but it's rarely 4 times the price. Bigger pizzas are usually a better value. |
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If you can get a square pizza, you’ll get more food too! A round pizza takes up about 78.54% (π/4) of the box. Using the formulæ for the area of a square and the area of a circle, see if you can figure out why. |
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If a circle has a radius of 1, then it has a circumference of 2π. This is the basis of “radian” angular measurement. There are 2π radians in 360°. Since 2π is about 6.28, 1 radian is about 1/6th of a pizza. (OK, so this poster is only an approximation...) |
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A good approximation of π is 22/7. This equals 3.14286 and π equals 3.14159. Less than 1/10% difference! SO, if a pizza is 22 pepperoni’s around... (see next poster) |