Venn Diagram — Quadrilaterals

Rectangle

• 4 sides, 4 right angles
• Opposite sides equal & parallel
• Diagonals equal & bisect each other
• Sum of interior angles = 360°
• Area = length × width

Parallelogram

• 4 sides, opposite sides parallel
• Opposite sides equal in length
• Opposite angles equal
• Diagonals bisect each other
• Adjacent angles sum = 180°
• Area = base × height

• 4 equal sides, 4 right angles
• Opposite sides parallel
• Diagonals equal, perpendicular & bisect each other
• Diagonals bisect angles at 45°
• Area = side²; Perimeter = 4 × side