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Pi is defined as the ratio of the circumference of a circle to the diameter of the circle.
Therefore, if you measure the diameter of the circle (call it 'D') then the circumference of the circle is pi times D.
To find the area of the circle use the formula Area = pi* D2 /4 .
Going one step further, to a sphere, if you measure the radius of the sphere (call it R, where R is half the diameter D), then:
1) The surface area of the sphere is Area = 4 * pi * R2 .
2) The volume of the sphere is Volume = (4/3) * pi * R3 .
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How can pi be used?
Pi (3.141...) is used for circles, and circles only. You use it to find the area and circumfrence.
When is pi used in maths?
WHEN THE TEACHER TELLS YOU THAT YOU NEED TO USE PI...SORRY THAT'S ALL I CAN ANSWER FOR YOU...LATERZWhen you use chords, diameter, and radii in circles
How do we use Archimedes' discoveries today?
People all around America still use Archimedes discoveries today. Like The snail screw we use that to raise and move water. Another discovery from Archimedes we use today is pi. We use pi to find the circumference for circles. Everyone should use the "Principles of Archimedes" because we use that to weigh objects.
What is the outside measurement of a circle called?
The distance around the outside of a circle is called the circumference. You can find this difference by multiplying the circles diameter by pi (3.141...).
How do you find the radius when you have the circuference?
circumference = pi * 2radius (diameter) so to find radius you use circumference/(2 x pi) this will find radius ----
How can pi be used?
Pi (3.141...) is used for circles, and circles only. You use it to find the area and circumfrence.
What can you use pi for?
Formulas relating to circles
What do they use pi in?
To calculate properties of circles
Why do you use pi to find volume?
You use pi to find volumes that include circles, as volume = area x depth, and the area of a circle always involves pi
Why use pi?
Pi is very important for finding circumfrences and area's of circles.
How is pi used to find the circumference of circles?
Circumference of any circle = 2*pi*radius or pi*diameter
How is pi used to find circumference of circles?
Pi times the diameter of a circle gives its circumference.
How can Pi find the volume of a sphere?
Volume = 4/3 * pi * radius3'Pi' is just a number. It doesn't 'do' anything, any more than '6' does. The specialthing about 'pi' is that it's the number that keeps popping up wherever circles areinvolved. So if a person is paying attention, it doesn't take him long to realize thathe can use 'pi' to do things, like with angles, and with things that move in circles,and like finding the area of circles and the volume of spheres.It's not the 'pi' that does it. It's the person who knows how to use the number 'pi'.
Why do we use pi's value to calculate a circle's area?
Pi is an experimentally found value that always works for circles, so we use it. Mathematical pi is not pie. it is a Greek letter pi.
How do you find the circumference of circles?
The circumference of a circle = pi*diametre = 2pi*radius
How do you find the pi circumference and area of circles?
Area=pi times radius squared Circumference=pi times diameter or pi times radius times two
How do you use pi in geometry?
Working out areas and volumes of circles and spheres respectively
