Brahmagupta's formula
where s = (a + b + c + d)/2. Compare Hero's formula.
- absolute error
- absolute frequency
- absolute geometry
- absolutely continuous
- absolutely convergent series
- absolutely summable
- absolute value
- absorbing set
- absorbing state
- absorption laws
- abstract algebra
- abstraction
- abundant number
- acceleration
- acceleration–time graph
- acceptance region
- acceptance sampling
- accessibility
- accumulation point
- accuracy
- accurate (correct) to n decimal places
- accurate (correct) to n significant figures
- Acheson, David
- Achilles paradox
- acnode