How To Work Out The Area Of A Circle With Radius Oct 28 2024 nbsp 0183 32 To find the area using the radius or the length from the center of the circle to the edge use the formula area r 2 where r is the radius For example if the radius of the circle is 6 inches first you would square 6 and get 36
The formula to find the area of a circle is to square the radius and multiply by The inverse of this is divide the area by then square root 178 400 Area of a Circle Calculator Use this calculator to easily calculate the area of a circle given its radius in any metric mm cm meters km inches feet yards miles etc
How To Work Out The Area Of A Circle With Radius
How To Work Out The Area Of A Circle With Radius
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Perimeter And Area Of A Circle
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Area of a circle is the region occupied by the circle in a two dimensional plane It can be determined easily using a formula A r 2 Pi r squared where r is the radius of the circle The unit of area is the square unit such as m 2 cm 2 etc Mar 29 2011 nbsp 0183 32 Answer First divide the circumference by Pi to give the diameter of the circle 27 divided by 3 14 8 59 Now halve the diameter to give the radius 8 59 divided by 2 is 4 29 Now use Pi r 2 to find the area of the circle Pi times 4 29 2 58 0 cm 2 to 1 decimal place
Find Area Using Radius The radius of a circle is the length of a straight line from the center of the circle to the outer edge The most commonly used formula to find the area given the radius of a circle is A 215 r 178 Thus the area of a circle A is equal to pi times the radius r squared How to Calculate the Area The area of a circle is Pi times the Radius squared A r2 or when you know the Diameter A 4 215 D2 or when you know the Circumference A C2 4 Example What is the area of a circle with radius of 3 m Radius r 3 Area r2 215 32 3 14159 215 3 215 3 28 27 m2 to 2 decimal places
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Based on the radius the formula for the area of a circle is A R2 Where A is the area of the circle pi is approximately 3 14159 a mathematical constant R is the radius of the circle To calculate the are of a circle using the radius follow these steps Step 1 Square the Radius These are the formulas to calculate the circumference and area of a circle c 2 r A r 178 d 178 4 where c stands for circumference r for radius and d for the diameter of the circle is a constant approximately equal to 3 14159265359 and among other things represents the circumference to diameter ratio of any circle
To calculate the area of a circle we use the formula Area r 2 r is the circle s radius Explore and discover the relationship between the area formula the radius of a circle and its graph with our interactive applet
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How To Work Out The Area Of A Circle With Radius - The area of a circle is 81 pi square units What is the radius of this circle Solution To answer this question you will have to remember a little bit of algebra Use the formula and substitute the values you know Then solve for the radius r Start with the area formula A pi r 2