Polygons and Types of Quadrilaterals

🎬 Video Tutorial

  • (0:01) Definition of Polygons: A polygon is a two-dimensional, closed shape made only of straight line segments, with no gaps or curved edges.
  • (0:56) Naming Polygons by Sides: Triangles (3 sides), quadrilaterals (4 sides), and pentagons (5 sides) etc.
  • (1:29) Sum of Interior Angles: The sum of a polygon’s interior angles is given by the formula (n – 2) × 180°, where n is the number of sides.
  • (2:01) Types of Quadrilaterals: Include trapeziums (at least one pair of parallel sides), parallelograms (both pairs parallel), rectangles (right angles), rhombuses (equal sides), and squares (equal sides and right angles).

📂 Revision Cards

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