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-rw-r--r--shape.hs6
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+data Shape = Circle Float Float Float | Rectangle Float Float Float Float
+ deriving (Show)
+
+area :: Shape -> Float
+area (Circle _ _ r) = pi * r ^ 2
+area (Rectangle x1 y1 x2 y2) = (abs $ x1 - x2) * (abs $ y1 - y2)