0
In every circle . . .
Area = (pi) x (radius)2
Diameter = 2 x radius
Circumference = (pi) x diameter
In this circle, Area = (pi) R2 = 81
R2 = 81/pi
R = sqrt( 81/pi )
Diameter = 2 x sqrt( 81/pi )
Circumference = (pi) x 2 x sqrt( 81/pi ) = 2 x sqrt( 81 pi ) = 18 sqrt(pi) = 31.9042 (rounded)
What else can I help you with?
How do you fund the circumference of circle when you know the area?
You dived the area by the circumference of the circle.
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 circumference of a circle if the area is 81 pi square feet?
If: pi*radius2 = 81*pi sq ft Then: radius = 9 feet Circumference = 2*pi*9 = 56.549 feet rounded to 3 decimal places
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 area of a circle with circumference 9.42in?
The area of a circle with circumference 9.42in is: about 7.061 square inches.
What is the circumference of a circle with an area of 81 pi square centimeters?
The circumference is 56.55 cm
The area of a circle is 81 pi square feet What is the radius?
The area is 9 feet. You find the square root of 81 which is 9. I want circumference, not area.
What is the circumference of a circle if diameter is 162 cm?
A circle with a radius of 81 cm has a circumference of 508.94 cm
Which is greater a rectangle with a perimeter of 36 meters or a circle with a circumference of 36 meters?
The circle has the greater area. For a perimeter/circumference of 36 metres, Area of circle = 103.13 sq metres (approx) Area of 9*9 square = 81 sq metres Area of an L*(18-L) rectangle (L < 9 metres) = anything between 0 and 81 sq metres.
How do you fund the circumference of circle when you know the area?
You dived the area by the circumference of the circle.
Is the Area of a circle and circumference of a circle have the same thing?
No,Circumference is like the perimiter and Area is the whole circle.
What is is circumference of a circle is 6.28. What is the area of the circle?
Your English grammar appears to be very poor. I think you mean ' If the circumference of a circle is '6.28' , then what is the area?'. Remember the two circle equ'ns. C = 2 pi r A = pi r^(2) Since we know 'C' at 6.28, and pi = 3.14 Then we can find 'r' (Radius). Hence 6.28 = 2 x 3.14 x r r = 6.28/( 2(3.14)) r = 1 (one) Substituting into 'A' A = 3.14 (1)^(2) A = 3.14 units ^(2). That's doing the calculation in two steps. However, by algebraic reARRANGEMENT WE CAN DO IT IN ONE STEP. However, be careful with the algebra. C= 2 pi r r = C/2pi r^(2) = (C/2pi)^(2) Substituting A = pi (C/2pi)^(2) Cancel down by 'pi' Hence A = [C/2]^(2) / pi A = [ 6.28 / 2 ] ^(2) / 3.14 A = [39.4383/4] / 3.14 A = [9.8596]/3.14 A = 3.14 As before.
Is the circumference and area of a circle the same?
The circumference of a circle is the distance arround the edge of the circle. The area of a circle is how big the inside of the circle is.
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).
Area of a circle with a 12 inch circumference?
The circumference of a circle is given by Circumference = pi x diameter. The area of a circle is given by Area = pi/4 x diameter2. Thus for a circle with circumference c = 12 in. The area will equal a = 11.459 in2.
What is the area of a circle that has a circumference of 16 PI?
The area of a circle that has a circumference of 16pi is: 201.1 units2
What is the area of a circle if its circumference is 20π?
The area of a circle, if its circumference is 20π, is: 314.16 square units.
