The number π(pi) is a mathematical constant
that is the ratio of a circle 's circumference to
its diameter, approximately equal to 3.14159.
It has been represented by the Greek letter “π”
since the mid -18th
century though it is also
sometimes written as “pi”.
3.
Definition
• π iscommonly defined as the ratio of a
circle’s cicumfernce C to its diameter d.
4.
Invention of pi
•Pi was invented in 1706 the earliest known
use of the Greek letter π to represent the ratio
of a circle's circumference to its diameter was
by the Welsh mathematician William Jones
in 1706
5.
Uses of pi
•In basic mathematics, pi is used to find
the area and circumference of a circle. Pi
can be used to find an area by
multiplying the radius of the circle
squared times pi. So, to find the area of a
circle with a radius of 3 centimeters, the
calculation would be π3^2 = 28.27 cm.
6.
• Using pi,it can measure things
like ocean wave, light waves,
sound waves, river bends,
radioactive particle distribution
and probability like the
distribution of pennies
