pentagon
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a pentagon has 5 lines of symmetry
Its Impossible. For there to be a shape where all five lines meet perfectly and there to be two pairs of perpendicular sides, there must three right angles. Alternitavely, you could have 1 pair of perpendicular lines and two rights angles, but certainly not both.
There are an infinite number. The simplest is a pentagon, with five sides.
A plane shape with five sides of equal length, and five equal angles: each of 108 degrees.
Shape of a T