The shapes with at least 1 pair of perpendicular sides are; The blue shape and the green shape at the button-right corner.
What are perpendicular sides?
Perpendicular by definition, means two lines, or sides, that meet at a right angle.
A right angle is the measurement of 90 degrees. Perpendicular sides are found in shapes like; rectangles, squares and other shapes with at least one angle measurement equal to 90⁰.
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