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How did you get 9 mm being the radius of a diameter of a circle being 18 explain?
Wiki User
∙ 11y ago
The radius of any circle is its diameter divided in half.
So: 18mm/2 = a radius of 9mm
Wiki User
∙ 11y ago
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Is circumference larger than radius?
Yes it is. Circumference is the whole area of the circle. Radius is from the middle to the side of the circle. Yes it is. The radius it half way across the circle from the center, while the circumference is all the way around the circle. The diameter is all the way across the circle, while being twice the radius. The circumference is about 3.14 times the diameter (or Pi if you prefer).
If you have a diameter of 8 what is the radius?
Four - Diameter is the length of the circle, one end to the other through the cirle, while radiusis from the middle of the circle , out. Hence Being half. s :)
What is the definition of diameter?
The diameter of a circle is the length of any line segment drawn through the center of the circle and having endpoints on the line that defines the circumference of the circle. It can also be defined as twice the radius of the circle, with a radius being a line segment with an endpoint at the center of the circle and one on the circumference of the circle.Diameter is a length measurement
How do you find the square footage of a round room?
the area of a circle is pi times the radius squared, the radius being half the diameter. Pi is approximately 3.14
How many lineal feet in a 6' circle?
The answer will depend on whether the 6 feet refers to the radius or diameter of the circle and which length is being measured in lineal feet.
What is the area of a circle with a diameter of 16 in?
201 square inches. Area is calculated as the value pi times the square of the circle's radius; pi being approximately 3.1416 and the radius being half the diameter. So in this case, area A = pi X 8 X 8 = 3.1416 X 64 = 201 square inches (approx.)
What is the area of a circle with a diamerer of 24 meters use 3.14?
area of a circle = pi*r^2 with pi being 3.1415926535..... that is the ratio between the diameter of the circle and it's circumference. r stands for radius (half the diameter if you didn't know) so for this circle to find the area all you have to do is 12 (half of 24 the diameter to find the radius) , then square it (144) then times it by pi which equals approximately 452.39 meters^2
How do you find the area of a circle if all you have is the circumference?
The formula for the area of a circle is pi(r2)...ie: 3.14xr2 The circumference is pi(diameter) and the radius (r) is half of the diameter (d) Example...if the circumference is 25.12in then the area is 50.24in Work being... Circumference = 3.14(d)=25.12 To find the diameter you have to get d by itself... Divide 3.14 to both sides to do that 3.14/3.14(d)=25.12/3.14 d=8 Now that you have the diameter you know that the radius is half of the diameter so radius (r)=4 Therefore the area of the circle is 3.14(42)=50.24in
What is the circumference of a circle?
The circumference is the distance around the circle, its "perimeter."The circumference of a circle is equal to π times the diameter of the circle (C = πd), or π times twice the radius of the circle (C = 2πr).The circumference is the distance around itIf you know the diameter (width) of the circle, you can use the formulaCircumference= Diameter x pi (approx 3.1416)Example : if a circle has a diameter of 5 cm then the circumference is 5 x π =5π (about 15.7 cm)The actual formula relates to the radius of the circle, which is half the diameter.Radius Formula : C = 2πr (2 pi times the radius)As long you remember the formula you should be fine....Circumference = 2 * pi * rOr pi * dwhere r = radius & d = diameter of the circle.Also pi (=3.143) can be roughly put down as 22/7 if you more comfy with fractions than the decimals.the equation is 2*pi*rr being the radius
What is the circumference formula of a circle?
It would be C = D * pi, d being the diameter. Also, C = 2 * r * pi would work, too, because the diameter is twice the radius.
What is Pi R Squared?
The formula to get the area of a circle ("R" being the radius of the circle). Radius means the distance from the center of the circle to the edge.It means pi times radius squared which is the formula for finding the area of a circle.
If the radius of a circle is 21cm What is the radius?
The radius of any circle is the straight line distance from the centre of the circle to any point on the circumference of the circle. The radius being 21 cm makes no difference to the definition of the radius; it just means that the straight line distance from the centre of that circle is 21cm away from any point on the circumference of that circle. The radius of a circle with a radius of 21 cm is 21 cm.
