Did you Know? The formula was developed by Indians at least 1000 years before Pythagoras.
There are formulas addressing values of and 2 and contain areas of circles and figures in the Sulbasutra (book of cords) treatise, which dates back to 300 BCE. The book also provides the modern-day Pythagoras Theorem formula.
One interesting fact about India is that it was the first country to develop sugar extraction and purification processes.