when trying to find squ. feet you have to find the area. the area of a circle is half of the diameter squared times pi half of the diamter is the radius therefore the area in squ. ft would be.. A = pi x r2
IF 16cm is EACH side, the answer is four (sides) times 16cm... so that's 64 cm.
16 cm*16 cm =256 cm2
Area of a circle = Pi * radius2
the area of the circle is increased by 400%
64 pi sqcm
256 pi cm2
Using 3.14 as Pi the area of circle is: 200.96
area = 9∏mm (approx. 28.26mm) circumference = 6∏mm (approx. 18.84mm)
In order to find the diameter of a circle if you have the area is to rearrange the formula for the area of a circle to put diameter as the unknown, like so: PIE*d = Area of a Circle d = (Area of a Circle) / PIE Therefore if the area of your circle is 40cm, 40/PIE = 12.73cm and that's the diameter.
it is the circumfrance of a circle divided by pi.
6 in.
The area of a full circle is pi x R squared where R = RADIUS The area of a semi circle is half of that, or pi x R squared/2
The circumference of a circle, if its diameter is 5.1mm, is about 16.02mm
16cm
diameter = 128/pi
The circle's radius is 1.5/2 = 0.75 ft = 9 inches The area of the circle is (pi) times (radius)2 = (pi) x (9)2 = 254.469 square inches (rounded)