Created
December 21, 2013 21:43
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| -module(math1). | |
| -export([area/1]). | |
| area({square, Side}) -> | |
| Side * Side; | |
| area({rectangle, Side1, Side2}) -> | |
| Side1 * Side2; | |
| area({circle, Radius}) -> | |
| 3.1415926588375214 * Radius * Radius; | |
| area({triangle, A, B, C}) -> | |
| S = (A + B + C) / 2, | |
| math:sqrt(S*(S-A)*(S-B)*(S-C)). |
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