An example of pi is its use in calculating the area of a circle.
Using Pi to Calculate Area
Pi (π) is a mathematical constant approximately equal to 3.14159. It's defined as the ratio of a circle's circumference to its diameter. A common example demonstrating pi is calculating the area of a circle using the formula:
Area = π * r2
Where:
- π (pi) is approximately 3.14159
- r is the radius of the circle
For instance, if you have a circular pizza with a radius of 7 units (which means a diameter of 14 units, as in the provided reference), you can calculate its area:
Area = π (7 units)2
Area ≈ 3.14159 49 square units
Area ≈ 153.94 square units
Using the approximation of π as 22/7, as the reference suggests:
Area = (22/7) (7 units)2
Area = (22/7) 49 square units
Area = 154 square units.
Therefore, the area of the pizza is approximately 154 square units. This illustrates how pi is a crucial component in real-world calculations involving circles.
