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`A = f( "a" , "b" , "c" , "d" , "D" )`

Enter a value for all fields

The **Area of Quadrilateral** calculator computes the area of a * Simple Quadrilateral*simple quadrilateral given the four sides and the length of a diagonal between opposing corners.

**INSTRUCTIONS:** Choose units and enter the following:

- (
**a**) - length of side a - (
**b**) - length of side b - (
**c**) - length of side c - (
**d**) - length of side d - (
**D**) - the length of the diagonal (See Diagram)

**Area of a Quadrilateral (A):** The area (**A**) is returned in square meters. However, this can be automatically converted to many other area units (e.g. square inches) via the pull-down menu.

- Area of a Quadrilateral from four sides and an angle
- Area of a Quadrilateral from four sides and the diagonal
- Quadrilateral Perimeter
- Quadrilateral Semi-Perimeter
- Quadrilateral Volume

The **Area of Quadrilateral** calculator is good for computing the amount of land within a four-sided fence. In this case, measure the four sides and the diagonal, and this calculator will compute the area in the fence.

- Area of a Circle - Multiple functions to compute the area of a circle or portions of a circle.
- Area of Triangle - Three Sides
- Area of Quadrilateral - Four Sides
- Area of Pentagon - Five Sides
- Area of Hexagon - Six Sides
- Area of Heptagon - Seven Sides
- Area of Octagon - Eight Sides
- Area of Nonogon - Nine Sides
- Area of Decagon - Ten Sides
- Area of Hendecagon - Eleven Sides
- Area of Dodecagon - Twelve Sides
- Area of Polygon - Any number of sides (n).