0
Add your answer:
Earn +20 pts
Does the area of a circle equal pi?
no, the area of a circle equals pi times the radius squared or circumference times diameter over four.
How do you find the area of a circle only knowing the radius?
If you know the radius (say it's 4), square the radius and multiply that number by pi. So for a radius of four, it would be 4 X 4 = 16 X 3.14 = 50.24, the area of the circle.
What fraction of the area of a circle of radius 5 lies between concentric circles of radius 3 and 4?
The area of a circle with radius 5 is 25 pi. Concentric circles with radius 3 and 4 have areas of 9 pi and 16 pi. The concentric circle with radius four consumes the circle with radius 3. 25 pi minus 16 pi leaves 9 pi of the circle with radius 5 left over. 16 pi is slightly over three-fifths of the circle with radius 5.
What is the area of a circle with the radius of four feet?
It is: pi*42 = 50.265 square feet to 3 dp
Cicumference of a four foot circle?
I'm sorry the question isn't clear enough. A four foot diameter? radius? area?
What is the area of a circle which is four inch radius?
A four-inch radius circle has an area of about 50.27 square inches.
If The area of one circle is four times as large as a smaller circle with a radius of 3 inches The radius of the larger circle is?
6
How many times bigger than the 5 circle in the 10 circle?
if you double the radius (or diameter) , you get four times the area. area of a circle = pi * radius squared
What happens to the area of the circle when the diameter is doubled?
As the area of a circle A equals pi times the radius squared, and doubling the diameter means multiplying the radius by four, the area is multiplied by 16 when you double the diameter.
ByWhat percentage is the cross sectional area of a circle increased if the radius is doubled?
300. (Doubling the radius multiplies the area by four times.)
Does the area of a circle equal pi?
no, the area of a circle equals pi times the radius squared or circumference times diameter over four.
If the radius of a circle is 4 inches what is the diameter circumference and area?
If the radius of a circle is four inches the diameter, circumference and area are:Diameter = 8 inchesCircumference = 25.13 inchesArea = 50.27 square inches
How do you find the area of a circle only knowing the radius?
If you know the radius (say it's 4), square the radius and multiply that number by pi. So for a radius of four, it would be 4 X 4 = 16 X 3.14 = 50.24, the area of the circle.
What is the circumference of a circle with the radius of 4?
The circumference of a circle with a radius of four is: 25.13
What happens to the area of a circle when the diameter is halved?
It is reduced by a quarter. If you halve the you also halve the diameter The area (A) of a circle is = pi x (radius)squared. If you halve the radius and then square it then to balance the equation the area must be divided by Four.
What fraction of the area of a circle of radius 5 lies between concentric circles of radius 3 and 4?
The area of a circle with radius 5 is 25 pi. Concentric circles with radius 3 and 4 have areas of 9 pi and 16 pi. The concentric circle with radius four consumes the circle with radius 3. 25 pi minus 16 pi leaves 9 pi of the circle with radius 5 left over. 16 pi is slightly over three-fifths of the circle with radius 5.
What is the area of a circle with the radius of four feet?
It is: pi*42 = 50.265 square feet to 3 dp
