Isoperimetric Inequality
Let a Plane figure have Area 
and Perimeter 
. Let the Circle of Perimeter . Then
where the quantity on the left is known as the Isoperimetric Quotient.
- Branch
- Branch Cut
- Branch Line
- Branch Point
- Brauer Chain
- Brauer Group
- Brauer Number
- Brauer-Severi Variety
- Brauer's Theorem
- Braun's Conjecture
- Breeder
- Brelaz's Heuristic Algorithm
- Brent-Salamin Formula
- Brent's Factorization Method
- Brent's Method
- Bretschneider's Formula
- Brianchon Point
- Brianchon's Theorem
- Brick
- Bride's Chair
- Bridge Card Game
- Bridge (Graph)
- Bridge Index
- Bridge Knot
- Bridge Number