Which shape is defined as having four equal sides and right angles?

The shape that is defined as having four equal sides and right angles is a square. A square is a special type of quadrilateral where all four sides are of equal length, and each of the interior angles measures 90 degrees. This definition distinguishes it from other quadrilaterals.

For instance, while a rectangle also has four right angles, its sides are not necessarily equal—opposite sides are equal instead. A parallelogram has opposite sides that are equal but does not require right angles or equal side lengths. A trapezoid typically has only one pair of parallel sides and does not need to have all sides equal or right angles.

Understanding the properties that define a square helps in distinguishing it from these other shapes, making it clear why the square is the correct answer in this context.