Which shape has four equal sides and four right angles?

• A. Kite
• B. Rectangle
• C. Parallelogram
• D. Square

Answer: (D)

Four equal sides and four right angles describe a square. A square is the only quadrilateral that has both properties at once: every side is the same length, and every interior angle is 90 degrees. The kite has two pairs of adjacent equal sides but not all four equal, so it misses the first property. The rectangle has four right angles but its sides come in two lengths, so it doesn’t satisfy the second property. The parallelogram has opposite sides parallel and equal, but its angles aren’t necessarily right angles. Since the shape must meet both conditions, it is a square.