Quadrilateral Calculator 4+

Quadrilateral Calculator calculates Area and Perimeter from different type of Quadrilateral. This is an efficient and accurate tool for calculating land area or measurement of land. Or to determine the rough square footage of various irregularly shaped storage closets.

Features:
• Calculates the area and perimeter of a quadrilateral given four sides and two opposite angles.
• Calculates the area and perimeter of a quadrilateral given four sides and two diagonals.
• Calculates the area and perimeter of a quadrilateral inscribed in a circle given four sides.
• Result is calculated on the fly.
• Include reference image for better understanding on usage.
• Result is copy-able to other apps.

In Euclidean plane geometry, a quadrilateral is a polygon with four edges (or sides) and four vertices or corners. Sometimes, the term quadrangle is used, by analogy with triangle, and sometimes tetragon for consistency with pentagon (5-sided), hexagon (6-sided) and so on.

Quadrilaterals are simple (not self-intersecting) or complex (self-intersecting), also called crossed. Simple quadrilaterals are either convex or concave.

Quadrilateral Calculator calculates Area and Perimeter from different type of Quadrilateral.
Area of a quadrilateral given four sides and two opposite angles. In this case it will be Bretschneider's formula.
Area of a quadrilateral given four sides and two diagonals. In this case it will be non-trigonometric Bretschneider's formula.
Area of a quadrilateral given four sides and the fact that it is cyclic quadrilateral. Where the sum of two opposite angles are 180 and known as Brahmagupta's formula.

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