equilateral triangle
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Any polygonal shape, other than a triangle can have perpendicular lines.
Shape of a T
a rhombus
A plus sign.
A regular pentagon does not have parallel or perpendicular lines. Some other possibilities include, but are not limited to:a circlean ovalan equilateral triangle or any triangle that is not a right triangle.(A right angle's lines are perpendicular. Those are what make it a 90 degree angle.)