Since: area = pi * radius2
Then:
Radius = square root ( area / pi )
And:
Diameter = radius * 2
The area of a cirle is: PI * r2 Where "r" is the radius, and PI is approximately 3.14. Hint: A radius is half of the diameter.
The area of a circle with a radius of 14.4 is 651.4
Area of a circle = pi*radius squared
The area of a circle of radius 21 is 1386
A circle with a radius of 135 units has an area of 57,255.53 square units.
If you do not have the area, what do you have? The radius is half the diamiter The radius is PieR2 Worked backwards if you know the circumfrence.
The area of a cirle is: PI * r2 Where "r" is the radius, and PI is approximately 3.14. Hint: A radius is half of the diameter.
Diameter = 1/2 of the circle's radius. Diameter = 2 times the square root of (the circle's area/pi) Diameter = the circle's circumference/pi
Using 3.14 as Pi the area of circle is: 0
Area of a circle = pi*radius2 measured out in square unitsfor pi use this number 3.14159and remember the radius of a circle = half the diameter.----------------------------------------------------------------Thus a circle with a 10 inch diameter would have an area of:Radius = diamiter/2, which is 10/2= 53.14159 * (5*5) = 78.53975 square inches
okay so, this week this is what I was doing in math. first, the formula is PiR2 [pies are squared] is what my teacher said. Divide the diameter by 2, to get the radius. multiply the radius by itself, then multiply it by 3.14.
The area of a circle of radius 21 is 1386
The area of a circle if the radius is 9m 254.5m2
The radius of a circle with the area of 36 is 3.385
The area of a circle with a radius of 14.4 is 651.4
Area of a circle = pi*radius squared
A circle with a radius of 135 units has an area of 57,255.53 square units.