Ihave two names, i can make a good tiling pattern. i am symmetrical in 2 ways, all my corners are the same size and 2 pairs of equal sides
what am i?

Rectangle.

A rectangle can also be called a quadrilateral, the two length sides are the same and the two height sides are the same. All the angles are 90°, and tiling patterns need to be something that tessellates, and rectangles tessellate. 

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