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What else can I help you with?
How do you find the diamter of a circle if you know the area?
In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.
How do you find the area of a circle if the circumference is 10?
We know that the area of a circle is pi * r2. We also know that the circumference of a circle is pi * d. Therefore, when you know the circumference of a circle and want to know the area, divide the circumference by pi to give you the diameter of the circle, divide the diameter by 2 to give you the radius, square the radius and then multiply by pi to get the area. So, 10/pi = 3.183. 3.183/2 = 1.5915. 1.59152 = 2.533 2.533 * pi = 7.958 to 3 decimal places. The area of your circle is therefore 7.958cm2.
How do you find the radius of a circle if you no the area?
You know: Area = (pi)r2 So, plug in your known values for the area and pi, then solve for r.
How can you get the radius of a circle when you know the area?
area = pi x r² So, divide the area by pi (3.14159...) and then find the square root.
How do you ESTIMATE the area of a circle if you know its radius?
Area of a circle = pi multiplied by (radius squared)Pi is approximately 3.141 so do r x r x 3.141
What is the area of the shaded sector of a circle when the radius is 3?
0. There is no circle so no shaded area of a circle!
How do you find the radius and diameter of the circle if you know the area?
Area of Circle = pi (radius)2 So , using this formula we can find the radius and also the diameter. Diameter = 2(radius)
How do you find the radius of a circle if you already know the area?
The area of a circle equals pi times the radius squared (A = pi*radius2) where pi is 3.1416 So the radius is the square root of the area divided by 3.1416
Why do you need to know the radius of a circle?
Let us say that you are going to paint a large circle onto the floor of your gymnasium (you are painting not just the circumference, but the whole circle) and you need to find out how much paint you need to buy. You know how many square feet will be covered by a gallon of paint and you therefore need to know the surface area of the circle. There is convenient formula for the area of a circle, which is area equals pi time the radius squared (pi is approximately 3.14). So if you measure the radius of the circle, you can figure out how much paint you need. There are also innumerable other situations in which it is useful to know the radius of a circle.
What is the Area of circle of radius 4?
The Area of a circle is Pi (r)(r) so the area of a circle with the radius of 4, would be 16pi
How do you find the circumference of a circle when you know the area?
OK, SO to find the area of a circle, you find the radius (half of the diameter), and fit it into the equation πr2=A where r equals radius and A = area. The perimeter of a circle is π multiplied by the diameter. π is ≈ 3.1415296.
What is area and circumference and are they the same thing?
The area of a circle is the amount of space inside the circle. The circumference of a circle is the distance around the outside of the circle. (So no, they are not the same thing.)
