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There are very many uses for them. A square, whose sides are a rational number, will have a diagonal of irrational length. The diagonals of most rectangles, with rational sides, will be irrational. The circumference and area of a circle (or ellipse) is related to pi, an irrational number. In the same way that pi is central to geometry, another irrational number, e, is fundamental to advanced calculus.

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9y ago
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9y ago

The rules for using Irrational Numbers are essentially the same as those for rational numbers. The main difference is that you cannot express an irrational number exactly as a decimal number.

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Q: How do you use irrational numbers?
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