In the following video (audio in Spanish) we show one way of doing it.
How to draw a circle video
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You can draw circles with different radii and then determine the length of their circumferences.
Measure the circumference video 1
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Measure the circumference video 2
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Measure the circumference video 3
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The fundamental idea consists in computing the ratios between the lengths of the different circumferences (C1,C2,C3) and their diameters (D1, D2, D3). The main result is that the ratios are equal to each other, that is,
and that common value defines the number  (pi ) Archimedes was a pioneer in getting an approximate value for the number (pi ). He used a procedure that we will describe in what follows. |
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