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A perimeter is either a path that encompasses/surrounds/outlines a shape or its length. The perimeter of a circle or an ellipse is called its circumference. A calculated perimeter is the length of a fence required to surround a yard or garden.

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Area is the quantity that expresses the extent of a two-dimensional region, shape, or planar lamina, in the plane. Surface area is its analog on the two-dimensional surface of a three-dimensional object.

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Islamic Patterns are very logical, mathematical and fit in perfectly on a plane. They always start from a circle and are traditionally made with a compass and a straight edge.

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Symmetry is defined as a balanced and proportionate similarity that is found in two halves of an object. It means one-half is the mirror image of the other half. The imaginary line or axis along which you can fold a figure to obtain the symmetrical halves is called the line of symmetry.