Quadrilaterals

INTRODUCTION

A quadrilateral is a geometric figure with four sides, four vertices, and four angles. Its properties depend on the lengths of its sides, the sizes of its angles, and the parallelism of its sides.

TYPES OF QUADRILATERALS

• PARALLELOGRAM: Opposite sides are parallel and equal in length.
• RECTANGLE: A parallelogram with four right angles.
• RHOMBUS: A parallelogram with four equal sides.
• SQUARE: Both a rectangle and a rhombus (all sides are equal, all angles are 90°).
• TRAPEZOID (OR TRAPEZIUM): Has at least one pair of parallel sides.
• KITE (OR DELTOID): Has two pairs of equal-length adjacent sides.

PROPERTIES OF QUADRILATERALS

• The sum of the interior angles is always 360°.
• Diagonals have different properties depending on the type of quadrilateral.
• In some quadrilaterals, sides or angles are equal.

IMPORTANCE OF QUADRILATERALS

Quadrilaterals are important in architecture, construction, and geometric analyses, as they appear in various structures and shapes.

CONCLUSION

Quadrilaterals have different properties depending on the lengths of their sides and the sizes of their angles. Their diversity allows for wide application in mathematics and practice.