The value of r is 8 ft.
What is Area of a Circle?
The area of a circle is the space occupied by the circle in a two-dimensional plane.
Alternatively, the space occupied within the boundary/circumference of a circle is called the area of the circle. The formula for the area of a circle is
A = πr2, where r is the radius of the circle.
Area of Circle = πr2 or πd2/4 in square units, where (Pi) π = 22/7 or 3.14. Pi (π) is the ratio of circumference to diameter of any circle. It is a special mathematical constant.
example:
If the length of the radius of a circle is 4 units. Calculate its area.
Radius(r) = 4 units(given)
Using the formula for the circle's area,
Area of a Circle = πr2
Put the values,
A = π42
A =π × 16
A = 16π ≈ 50.27
Given:
Area = 64π
So, Area of circle= πr²
64π = π* r²
64= r²
r=√64
r = 8 ft
Hence, the value of r is 8 ft.
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