## surdA now little-used term meaning the square root of a whole number that has an irrational value. Some examples are √2 (see square root of 2), √3, and √10. A surd can often be simplified using the fact that √( ab)
= √a × √b. For example, √12 = √(4
× 3) = √4 × √3 = 2√3. Surds may be used to express some results in exact form, such as sin 60° = √3/2. ## Related category• TYPES OF NUMBERS | |||||

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