Pi has been known about since
A. 1910
B. the 1600 s
C. ancient times
D. none of the above

Pi has been known about since ancient times, with its early approximations found in ancient civilizations like the Babylonians and Egyptians, who derived formulas to estimate its value thousands of years ago. They understood the relationship between a circle’s circumference and its diameter long before the decimal representation we use today!

In practical terms, pi is essential not only in mathematics but in many real-world applications, such as engineering, architecture, and even in nature. For example, it helps calculate areas and volumes of circular objects or structures, ensuring they’re built accurately, from the wheels of your car to the domes of grand buildings.