Question

fill in the blank. a square is a special kind of _. pentagon triangle trapezoid rectangle

Explanation:

A square has four - equal sides and four right - angles. A rectangle has four right - angles, and when all its sides are equal, it becomes a square. So a square is a special rectangle. Other options like pentagon (5 - sided), triangle (3 - sided), and trapezoid (a quadrilateral with one pair of parallel sides) do not have the properties that make a square a special case of them.

Answer:

rectangle