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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 ----
