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What do you have? The area of the circle or the circumference?
Area: divide the area by pi, then square root it
Circumference: divide the circumference by 2 then divide it by pi
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What is the circumference of a circle 2 m radius?
By using the equation 2πr that is used to find the circumference, you get 12.56m
Find the radius for a circle with the equation x2 plus y2 equals 9?
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
How do you find the area of a circle using its diameter?
The area of a circle is pi(radius)2 Radius is half the diameter. Simply divide the diameter in half and enter it into the equation 3.14(diameter/2)2
How do you find the area of a circle with just the radis?
If you have the radius of the circle then just plug it into the equation which ispi x r2This equation is used to find the area of a circleSo if your radius is 5 then all you do is 52 and then multiply by piHope that helps.Jamz159
Equation to find the area of a circle?
Area of a circle = (pi) (R2)R = radius of the circle = 1/2 of its diameter
What is the circumference of a circle 2 m radius?
By using the equation 2πr that is used to find the circumference, you get 12.56m
What is the area of a circle with a radius of 21cm?
A circle with the radius of 21cm would have an area of approximately 1384.74 cm. You would find this by using the equation of pi*(radius^2) = pi*(21^2).
Find the radius for a circle with the equation x2 plus y2 equals 9?
Type your answer here. Find the radius for a circle with the equation x2 plus y2 equals 9? ..
The equation of the inner circle is x2 plus y2 equals 4 the radius of the outer circle is four times the radius of the inner circle write the equation of the outer circle?
The inner circle is x2 + y2 = 4. The radius of the inner circle is the square root of 4, which is 2. To find the radius of the outer circle, multiply 2 times 4. The radius of the outer circle is 8. Square 8 (82 or 8 x 8) to find the number to put into the equation of the outer circle. This is 64. The equation for the outer circle is x2 + y2 = 64.
How do you find the area of a circle if you have the radius?
The equation for the area of a circle = pi x radius². First square your radius (multiply it by itself) Then multiply it by pi, which you may use either by using the pi button on your calculator or by using an approximate value of 3.1416 (3.14 will be close).
How do you find the area of a circle using its diameter?
The area of a circle is pi(radius)2 Radius is half the diameter. Simply divide the diameter in half and enter it into the equation 3.14(diameter/2)2
How do you find the radius of circle with area 144pi?
Equation for the area circle = pi x radius squared If the area is 144pi, then you need to find the square root of 144, which is 12. Therefore, radius = 12
What is the equation to find the Area of a circle?
π×(radius)2http:/www.mathwarehouse.com/geometry/circle/area-of-circle.php
How do you find the area of a circle with just the radis?
If you have the radius of the circle then just plug it into the equation which ispi x r2This equation is used to find the area of a circleSo if your radius is 5 then all you do is 52 and then multiply by piHope that helps.Jamz159
Equation to find the area of a circle?
Area of a circle = (pi) (R2)R = radius of the circle = 1/2 of its diameter
How do you find circumference using radius'?
Circumference of a circle = 2*pi*radius
How do you find the are of a circle with only the circumference?
It's important to know the formulas for all these characteristics of circles, and to recognize what they have in common. Area of a circle = πr2 Circumference of a circle = 2πr or dπ Where in the above equations r represents radius, and d is diameter (2r). Both these equations have r in them. Find the radius using the circumference equation, and then plug it into the equation for Area
