what is the area of a circle with a diameter of 236mm?
369376
Area of a circle = pi * r^2\n= pi * 118^2  <--take half of 236 mm to find the radius\n= 43744 mm^2\n\nArea of a square = s^2\n43744 = s^2\ns = 209 mm\n\nSo your square has to have sides of 209 mm if it will have the same area as the circle above.
188331
Area = pi times r squared\n\nDivide 199 by pi, this will be r^2\n\nDo the square root of this to get r\n\nThen double it to get d\n\nIf you use the pi button for pi, it is 15.917747 ft
193691
area = r^2 * pi\narea = 9.8^2 * 3.1415\narea = 96.04 * 3.1415\narea is about 301.71
48612
Let r be the radius of the circle and s the length of the square's sides.\ncircle perimeter=2*pi*r, square perimeter=4*s\n2*pi*r=4*s => s=pi*r/2\ncircle area=pi*r^2, square area=s^2\ns^2=(pi*r/2)^2=pi^2*r^2/4\nBut pi<4 => pi^2*r^2/4<pi*r^2 => square area < circle area
135768
Area = Pi times the radius squared (A=pr2)\nIf you need to know how to find the radius, go here:\n\nhttp://math.about.com/library/blcircle.htm
915477
PI is not spelled like the pie you eat. \n\nThe area of a circle is found by multiplying pi (3.14) by the radius squared. The radius is half of the diameter so it is 3. the radius squared is 9, so multiply that by pi and get 28.26\n\nthe area is 28.26 square meters
572270
triangle area = 1/2(height * width)\n\ncircle area = pi * radius^2
522790
Circumference = 2*radius*pi\n\nTherefore, the radius is 30\n\nand the diameter is 60..\n\nHope that helps...
369549
2.36 meters  = 236 cm \n2.54 cm = 1 inch\n\nso 236 /  2.54 = inches\n\n92.91 inches
999585
I knew it as I did the activity.Draw a circle an divide it into 8 equal parts.It should be equal.Then cut it and stick such that the tip of one cone is up and the other is down.See that the edges stick each other close together.Do it until you finish all the 8 parts.\nNow you needed some concentration.You can see that it forms a parallelogram.Now area of parallelogram=base*height and the circumference of circle=Pi*2*radius.The base of the diagram is half the circumference that is Pi*radius,and the height will be the radius.You will also notice that Area of parallelogram=Area of circle.Therefore,Base*height=Pi *Radius *radius.so, now you have got pi*radius square.\nHope you like my answer.
592888
Area of the circle = pi r^2\nArea of the square = x^2\n\nThese are equal so x^2 = pi r^2\nTake the sqrt of both sides:\nx = sqrt(pi) r\nx = 1.77245385 r\n\nBut the diameter is twice the radius\nd = 2 r\n\nAs you can see d > x  because 2 > 1.77245385\n\nSo the diameter of a circle (d) would be larger than the side (x) of square with the same area.\n\nThe answer is:  The diameter of the circle
729233
limit is not specified so we asume whole area\n\nx^2+y^2 = a^2\n\nthis is a circle of radius a\n\nso area = pi*a^2
803983
First ... assume an average diameter (or radius) for the planet.\n\nThe average radius normally given is 3963.1 miles (6378 km).\n\nCircumference of a circle = 2 * pi * r = pi * d\n\nCircumference = (2) * (3.14159) * (3963.1) = 24900.9 miles\n... which is approximately 40074 km.
237156
Pi * r^2\n\n(Pi R Squared)\n\nwhere R is the radius (which is also equivalent to half the diameter)
183956
Half the diameter, or circumference divided by 2.pi
522898
Imagine you unraveled the cylinder, the middle would turn into a rectangle, right? so to find the surface area, take the height of the cylinder and multiply it by the circumference of the circles at the bases, then add in the area of the circles. Circumference is 2(pi)r and area is (pi)r^2.
919539
Area =pi (Radius)^2 = 22/7(3)^2 =22(9)/7 = 28.29 ft^2 Ans.