<-- a
<-- b
<-- c
<-- d
<-- angle 1 α
<-- angle 2 γ

##### How does the Bretschneiders Formula Calculator work?
Free Bretschneiders Formula Calculator - Calculates the area of a quadrilateral using Bretschneiders Formula
This calculator has 6 inputs.

### What 2 formulas are used for the Bretschneiders Formula Calculator?

s = a + b + c + d
A = sqrt[(s - a)(s - b)(s - c)(s - d) - abcd · cos2(0.5(α + y))]

For more math formulas, check out our Formula Dossier
##### What 7 concepts are covered in the Bretschneiders Formula Calculator?
area
Number of square units covering the shape
bretschneiders formula
Alternative formula to determine the area of a quadrilateral
A = sqrt[(s - a)(s - b)(s - c)(s - d) - abcd · cos2(0.5(α + y))]
geometry
study of math dealing with shapes, space, and properties of space
perimeter
The distance around a shape or object
quadrilateral
Polygon with 4 edges/sides and 4 corners/vertices
semi-perimeter
half the perimeter of a polygon
s = P/2
trigonometry
Trigonometry studies relationships between side lengths and angles of triangles. The word trigonometry comes from the Greek word trigonon which means triangle and metron which means measure

## Bretschneiders Formula Calculator Video

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