Q:

# How is pi used in the real world?

A:

Pi is an irrational number engineers use in many everyday tasks, including calibrating the speedometer of automobiles. The wheels on a vehicle are circular, so the circumference of the tire, which is the distance it travels each rotation, is equal to pi times the diameter.

## Keep Learning

Pendulum clocks greatly improve the ability to keep time, according to About.com. The pendulum moves in the arc of a circle, with the arm of the pendulum equal to the diameter. Thus, pi figures into adjusting the clock for accuracy.

Statisticians use pi in solving questions concerning probability. The standard distribution, or bell curve, depends on pi as a constant.

The speed at which a professional baseball pitcher throws a ball depends on the length of his arm and pi. The joints in the arm are pivot points and the length of bone is the radius of a circle.

Pi is useful in calculations concerning waves. Thus, it finds use in light, sound and electronics. It is a part of many different types of entertainment from concerts to music files. It is a part of projectors as well as the screen on a computer. Pi is even involved in the creation of the rainbow, as well as a person's favorite color.

Sources:

## Related Questions

• A: Some real-world examples of a trapezoid include a typical bicycle frame, the wings on an airplane, most tables, most desks and some purses. A trapezoid is ... Full Answer >
Filed Under:
• A: Pyramid shapes are virtually everywhere; they are prominent in the world of architecture and in works of art. Well-known examples include the Luxor Hotel i... Full Answer >
Filed Under:
• A: Heredity can influence behavior in many ways, with one such example being how color is processed in the brain; color blind people perceive the world in an ... Full Answer >
Filed Under:
• A: When going about the day-to-day tasks of working, running errands and attending school, most people in China wear the same street fashions as people anywhe... Full Answer >
Filed Under:
PEOPLE SEARCH FOR