tmes it by pi i think answer is 45.87 rounded up
Area of a circle = Pi * radius2
the area of the circle is increased by 400%
Area of a circle = pi*radius2
The area of a 3 cm circle is: 7.069 square cm
all you do is find the area of the circle... if you mean find the squares area, find the area of the circle, and then the square's area and subtract the squares area to the circles area
diametre of circle
It is 25cm
2.35
92mm
6.25pi meters2Another answer:Area of a circle = pi*radius2Area = pi*2.5*2.5 = 19.63495408 square meters
Times the diametre by pi
2*radius=diametre radius=2.1 Area=pi*(radius)^2 Area=3.1428*2.1*2.1 Area=13.86
40*pi metres
If you had a circle and cut along the diametre you would get two half cirlces.
4 times pi. That is about 12.57.
d = 11.46 inches
The circumference of a circle = pi*diametre = 2pi*radius