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A= pi(r)^2
C=pi*d
r= 1/2(d)
Area=196pi
Since you know that 196 has to be squared because of the Area formula, to find the radius, you take the square root of the number, this number is the radius of the circle. You also know that the circumference is pi times the diameter and you know the radius is half the diameter, or the diameter is twice the radius.
sqrt(196)=14
14=r
d=28
Circumference= 28pi
What else can I help you with?
What is the formula for finding circumference and area of a circle?
Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
What is the relationship between the circumference of a circle and the area of a circle?
Area = (Circumference squared)/4 pi Circumference = 2 sqrt(Area times pi)
If the area of a circle is 16pi what is the circumference of the circle?
area = {pi}r2 = 16{pi} --> r2 = 16 --> r = 4 circumference = 2{pi}r = 2{pi}4 = 8{pi}
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 a diameter of a circle?
If you have the circumference: circumference = (pi) * diameter diameter = circumference / (pi) If you have the area: area = (pi) * radius * radius radius = square_root(area / pi) radius = diameter / 2 diameter = 2 * square_root(area / pi)
How do you do circumference and area?
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius2
What is the formula for finding circumference and area of a circle?
Circumference of a circle is (pi * diameter). Area of a circle is (pi * r2).
How do you calculate circumference and area of pi?
Pi is the number of times the diameter of a circle will fit into the circumference. Pi is not a circle, and does not have a circumference or area. To calculate a circumference USING pi, the circumference is diameter * pi. To find the area using pi, area = pi * radius * radius
How do i find circumference and area of a circle?
Circumference of a circle = 2*pi*radius or diameter*pi Area of a circle = pi*radius squared
How is pi in relation to a circle?
Pi is related to the area and the circumference of the circle. The area is Pi multiplied by the radius of the circle squared and the circumference is Pi times the diameter of the circle. if you're wondering how it works, pi is the area of a circle with radius of 1 (unit), and the circumference of a circle with a radius of ½ (unit).
What is the area and circumference of 12 ft?
Area of a circle = pi*radius2 Circumference of a circle = 2*pi*radius or pi*diameter
What is the relationship between the circumference of a circle and the area of a circle?
Area = (Circumference squared)/4 pi Circumference = 2 sqrt(Area times pi)
What is the surface area of a circle with a circumference of 28?
Circumference of a circle: 2 x Pi x r (with r = the radius of the circle).Area of a circle: Pi x r x rThe circumference is 28, so:2 x Pi x r = 28r = 28 / (2 x Pi)Area = Pi x (28 / (2 x Pi)) x (28 / (2 x Pi)) = 62.4[rounded on one decimal] or more accurately (196 / Pi).
What does pi have to do with the area and circumference of a circle?
It is used in finding the circumference and area of a circle. Circumference = 2*pi*radius or pi*diameter measured in linear units Area = pi*radius2 measured in square units
What is the formula for area and circumference of a circle?
The formula for the area of a circle is pi * radius squared. The circumference of a circle's formula is pi * diameter. NOTE: pi equals approx. 3.14
What is the circumference and area when radius 9in and d 7.3?
Circumference of a circle = 2*pi*radius or pi*diameter Area of a circle = pi*radius2
How is finding the area of a circle similar to finding the circumference of a circle?
They both use pi:- circumference = 2*pi*radius or diameter*pi area = pi*radius2
