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Area in square units = pi*radius2
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∙ 11y ago
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Why is pi used in every circle formula?
By definition Pi is the relation between the radius and circumference of a circle.
When would you want to find the circumference of a circle?
The first step to calculate circumference of a circle is to know the formula. There are two formulas that can be used for the purpose. They are:Circumference of a circle formula 1: C = π x diameterCircumference of a circle formula 2: C = π x 2 radiusHere are a few illustrations that would make problem solving related to finding the circumference of a circle easy:Using the Radius:If the value of the radius is known then it can be put in the 'circumference of a circle equation' already mentioned and the value calculated. For example:Given that the radius of circle is 3 cm.Circumference of the circle: C= π x 2 radiusor, C= 3.14 x 2 (3) cmor, C= 18.84 cmUsing the Diameter:If the value of the diameter is known it can be directly put in the 'circumference of a circle equation' and the circumference calculated. For example:Given that the diameter of a circle is 6 cm.Circumference of the circle: C= π x diameteror, C= 3.14 x 6 cmor, C= 18.84 cm
What is the quadriatic formula used for?
To find the solutions of x in a quadratic equation.
What is PI used for?
Pi is used to find a lot of things, volume, area, diameter, radius, but most commonly, circumference. To do that, you multiply the diameter of a circle by pi, (3.14159) then you have the circumference.it is used to calculate the area and volume of a circle or cylinderalso to find circumferenceEX:DIAMETER X PI = CIRCUMFERENCE+++True but I'd question the "most commonly" because Pi is also fundamental to a huge range of calculations involving motion or force in circular or circle-function paths, and to harmonic calculations (sound, vibration, electrical circuit laws, etc.).'Incidentally, there is a neat trick by pure co-incidence worth knowing if you often use a calculator or the calculator pad on a PC keyboard to find areas of circles from their diameters. The standard formula is Pi*R^2 where R is the circle's radius, but since 2R = Diameter the formula w.r.t Diameter is therefore (Pi*D^2)/4. Now, Pi/4 = 0.7854 to enough decimal places for most everyday calculations, so then the formula simplifies to 0.7854*D^2. Look at your keypad and you see those 4 digits sit in a tidy square in the top left, nice and easy to find if you need to keep entering them!
Where can you find answers to the distance formula?
d=rt Distance=Rate (Speed) x Time This equation can be used to find Distance, Rate, and Time.
The formula used to find the area of a circle is?
Area = (pi) (R)2
What is the constant used in the formula to find the area of a circle?
You are thinking of pi.A = (pi)r^2
The formula d times pi is used to find what measurement of a circle?
The circly bit on the outside
What is the formula used to find the area of a sector?
area of sector = (angle at centre*area of circle)/360
Differences between a numeric value and a formula?
A formula is used to find the numeric value of an answer. For example: pi*radius2 = area of a circle in square units
To find the standard equation for a circle centered at the origin you used the distance formula since the radius measures?
The distance from any point on the circle to the origin
Who discovered the formula for the circumference of a circle?
Archimedes created the formula for measuring the circumference of a circle he used many-sided polygons, both inside and out to approximate it.
Why is pi used in every circle formula?
By definition Pi is the relation between the radius and circumference of a circle.
What does the formula Pi r2 mean?
It is the formula used in finding the area of a circle which is pi times radius squared
How to find square footage of a circle outside of the 18ft and inside 20ft?
If the 18 stands for the radius, then the area formula : A= Pi r2 can be used. The question is standed strangely.
How have you used pi?
To find out the area of a circle.
What is the formula used for finding area of a circle?
area= pie*(r^2) = πr2
