Calculate area, perimeter, and properties for various four-sided polygons.
Input Parameters
Shape Properties
25.00sq units
Area
Calculated geometric measurements
Perimeter20.00
Diagonal Length7.07
Classification
A regular quadrilateral with 4 equal sides and 4 right angles.
About this calculator
Quick Reference
Square Areas²
Rectangle Areal × w
Trapezoid Area½(a+b)h
What is a Quadrilateral?
A quadrilateral is a polygon with four sides, four vertices, and four angles. The sum of the interior angles of any simple quadrilateral is always 360 degrees. Common types include squares, rectangles, rhombuses, parallelograms, and trapezoids.
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Pro Tips
Hierarchy: A square is a rectangle, a rhombus, and a parallelogram.
Trapezoid: Only one pair of parallel sides. The area is based on the average of the two bases.
Rhombus: All sides equal, diagonals bisect each other at 90 degrees.
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Fun Facts
"The word 'quadrilateral' comes from 'quadri' (four) and 'latus' (side)."
"Kites are quadrilaterals where two pairs of adjacent sides are equal."
"A quadrilateral with no two sides parallel is called a trapezium in some regions and a trapezoid in others."
