Bretschneider's Formula
Given a general Quadrilateral with sides of lengths 
, 
, 
, and 
(Beyer 1987), the Area is given by
where
and 
are the diagonal lengths.See also Brahmagupta's Formula, Heron's Formula
References
Beyer, W. H. (Ed.). CRC Standard Mathematical Tables, 28th ed. Boca Raton, FL: CRC Press, p. 123, 1987.
- Brocard Circle
- Brocard Diameter
- Brocard Line
- Brocard Midpoint
- Brocard Points
- Brocard's Conjecture
- Brocard's Problem
- Brocard Triangles
- Bromwich Integral
- Brothers
- Brouwer Fixed Point Theorem
- Browkin's Theorem
- Brown Function
- Brown Numbers
- Brown's Criterion
- Broyden's Method
- Bruck-Ryser-Chowla Theorem
- Bruck-Ryser Theorem
- Brunnian Link
- Brunn-Minkowski Inequality
- Brun's Constant
- Brun's Sum
- Brun's Theorem
- Brute Force Factorization
- B-Spline