A quadrilateral is a fundamental polygon defined by four sides, four vertices, and four angles. The name itself is a giveaway, derived from the Latin quadri (four) and latus (side).
To qualify as a quadrilateral, a shape must be a closed, two-dimensional figure made of straight line segments.
KEY CHARACTERISTICS
Regardless of their specific name (like square or trapezoid), all quadrilaterals share these essential traits:
Sides: 4 straight edges.
Vertices: 4 corners where the sides meet.
Interior Angles: The sum of all four interior angles is always 360°.
Diagonals: Every quadrilateral has exactly 2 diagonals (lines connecting opposite vertices).
DIFFERENT TYPES
1. Square
A quadrilateral with 4 equal sides and 4 right angles.
2. Rectangle
A quadrilateral with 4 right angles and opposite sides of equal length.
3. Rhombus
A quadrilateral with 4 equal sides and opposite angles equal.
4. Trapezium
A quadrilateral with 1 pair of parallel sides.
5. Parallelogram
A quadrilateral with opposite sides parallel and equal.
6. Kite
A quadrilateral with 2 pairs of adjacent sides equal.
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