Master the world of four-sided shapes: rectangles, squares, parallelograms, and trapezoids with their properties, formulas, and real-world applications.
A quadrilateral is any polygon with exactly four sides, four vertices (corners), and four interior angles. The word comes from Latin: “quadri” (four) + “latus” (side).
Key Property:
The sum of interior angles in any quadrilateral is always 360°. This is true for all quadrilaterals, regardless of shape.