Brahmagupta's Formula for the area of a cyclic quadrilateral:
A = √[(s − a)(s − b)(s − c)(s − d)]
where
> a, b, c, d = lengths of the four sides
> s = semiperimeter = (a + b + c + d)/2
Applies to any quadrilateral that can be inscribed in a circle (as shown in the diagram).
BREAKING: The world is now experiencing its largest oil supply shock in history, losing nearly 20 million barrels of oil supply per day.
Top oil supply shocks:
1. Hormuz Closure (NOW): -20 million b/d
2. Iranian Revolution (1978): -5.5 million b/d
3. Yom Kippur War (1973): -4.5 million b/d
4. Iraq-Kuwait War (1990): -4.3 million b/d
5. Iran-Iraq War (1980): -4.0 million b/d
6. Russia-Ukraine War (2022): -2.0 million b/d
The current supply shock is roughly the same size as the top 2-6 COMBINED.