A right angled triangle is an example of a shape with exactly 2 perpendicular sides.
A right trapezoid has exactly one pair of perpendicular lines and is a quadrilateral.
Symmetry is when something has exactly the same shape on either side of an axis line. T is a vertical symmetrical shape.
shape no pairs of perpendicular sides
Shape of a T
Any shape, other than a triangle can have a pair of perpendicular sides.
It could be a right angle triangle