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Rectangle
Goats (and most other animals with hoofs) have horizontal slits which are nearly rectangular when dilated. This gives goats vision covering 320  340 degrees; this means they can see virtually all around them without having to move (humans have vision covering 160  210 degrees). Consequently, animals with rectangular eyes can see better at night due to having larger pupils that can be closed more tightly during the day to restrict light. Interestingly, octopussys also have rectangular pupils...In Euclidean plane geometry, a rectangle is any quadrilateral with four right angles. Another name is equiangular quadrilateral, since equiangular means that all of its angles are equal (360°/4 = 90°). It can also be defined as a parallelogram containing a right angle. The term oblong is occasionally used to refer to a nonsquare rectangle...A rectangle is a square when both pairs of opposite sides are the same length. This means that a square is a specialized case of the rectangle and is indeed a rectangle...
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