50.265 square mm
A circle with a diameter of 4 mm has an area of : 12.57 mm2
When you try to figure out an area of a circle, you square the radius, then multiply it by pi to get the area of a circle. A radius square is radius x radius, or radius squared.
The area of any circle is (pi) x (radius)2 .The area of half the circle is just half of that number.
A circle with a radius of 2.5 meters has an area of 19.63 square meters.
A circle with a radius of 10 feet has an area of 314.16 square feet.
You neglected to say whether the 4mm is the radius of the circle, or the diameter,or the circumference. Each possibility leads to a different area.
You neglected to say whether the 4mm is the radius of the circle, or the diameter,or the circumference. Each possibility gives you a different area.
Pie (3.14159...) times (*) 2 times (*) radius === or This equation may be for the area but hopefully it's for circumference. Anyway, the answer to your question is 25.13274123... (Pie times 2 times 4mm).
Using 3.14 as Pi the area of circle is: 50.24
A circle with a diameter of 4 mm has an area of : 12.57 mm2
The area of a circle with a radius of 14.4 is 651.4
The radius of a circle with the area of 36 is 3.385
Area of a circle = pi*radius squared
The area of a circle of radius 21 is 1386
The area of a circle if the radius is 9m 254.5m2
A circle with a radius of 135 units has an area of 57,255.53 square units.
The area of a circle with a radius of 2m is: 12.566 m2