How do you draw a unit circle?
140091
Unit circle is a circle centred in the origin (0,0) with radius 1.\nYou can use it to find trig. functions value as follows:\nDraw a line from the center to some point in the circle, and another vertical line from that point to Y=0. There you'll get a triangle. The Hypontenuse of that traingle measures ONE, then the the sinus and cosinus of the angle between Y=0 and first line you draw are represented by triangle sides.\nExamples: \n1. Draw an angle of 60° [using Y=0 as one side of angle], and complete the rect triangle, then measure the adjacent side and this is the value of cos(60), the oposite side is Sin(60)\n\n2. You want to calculate arcsin(√2/2), then draw a vertical line from Y=0 with length √2/2 that touch the circle, then draw the line between that point in the circle and the centre (0,0), measure the angle and that's it. Now measure the Adjacent side (over Y=0) of this triangle and 'voila' this is Cos(Arcsin(√2/2)).\nHope it helps.\n\nP.S. In the figure you'll find that Adjacent side is [ Using Pytagoras: H^=A^2+B^2]\nA=√(H^2-B^2)\n√[1-(√2/2)^2)]= √2/2\nCos( ArcSin(√2/2))=√2/2
707089
Fold the circle in half\n\nStart to fold the half in half again, but only crease it near the 90 degree angle formed; this identifies the center of the circle.  Open it back up to where it's only folded in half once.\n\nFold the half into thirds with each of the 2 folds running through the center of the circle\n\nFold once more in half, again with the fold running through the center of the circle.  You Now have something close to a skinny triangle\n\nHolding the skinny triangle pointing up, cut from just above the bottom right corner to about midway of the opposite long side.  \n\nBTW, you don't have to actually start with a circle.  You can just start with a regular sheet of paper if you adjust the cut for the correct results. Mine came out nice!
823649
http://www.aperfectcircle.com \na Perfect Circle
1143102
Example - you'll need to apply it to your own endpoints.\n\nA circle is described on the line joining (-2,5)and(3,4) as diameter, find its equation:\n\nThe equation for a circle is:\n(x-h)^2 + (y-k)^2 = r^2 where (h,k) is the center and r is the radius\n\nIt is easiest to find the center first. it is the midpoint of the line and the slope is constant:\nh = x1-[(x1-x2)/2] = 3 - 5/2 = 1/2\nk = y1-[(y1-y2)/2] = 5 - 1/2 = 4.5\n\nNow, find the radius using the distance formula to find the distance between the center and the endpoint or by using a right triangle where dx and dy are the lengths of the legs. I prefer the latter, but they are pretty much the same:\ndx^2 + dy^2 = r^2\nr^2 = (5/2)^2 + (1/2)^2= 26/4 = 13/2\nBy substituing back into the equation for a circle:\n(x-.5)^2 + (y-4.5)^2 = (6.5)^2 = 42.25
595970
draw a line maesuring 2.5 cm..this is bc.then using a protractor make an angle of 60 degrees n on the angle measure the other side of 3.5 cm.join the end points and u get ur triangle.The circuncircle is a circle that touches all 3 vertices.then draw the perpendicular bisector of any two sides..the intersectin point becomes ur centre for the circle.now with the radius equal to the distance between the centre n the vertex draw a circle..tada!
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.
914474
well from my understanding there is 360 degrees in the circumference of a circle so divide that by 12 and you get 30 so every 30 degrees mark it.\nI hope i am not to wrong here!\n\nUnless its bigger but you can draw it down to fit that scale, that's not hard.
70364
Well, it would depend what graphics toolkit you're using, what operating system, etc. It would probably involve:\n\n1. creating a window\n2. creating a canvas or drawing area\n3. creating all the elements of a clock on the canvas.\n\nThe "hard" part is 3, where you probably have to use trigonometry to turn your circular clock coordinates into the usual cartesian coordinates.
393919
dear friend\nyou should use drawing tool box if not there then click on view menu then toolbar and click on drawing the autshape circle line and text box is there then click on circle and drag in word area while pressing left mouse button you will find a fill handle over each side you can resize it afterward then click on text filed do similarly this will allow you write text over after then place text box over circle.\nhope you got it\nbye
837293
I haven't done one of these in quite a while. \n\nWhat would you differential element be?  How about r*(dtheta)*dr?\n\nthat sort of a ds*dr   where ds depends on the radius.  Try it! \n\nNote that without the sin theta you'd get the int rdthetadr with r 0 to R and theta 0 to 2pi  You'd get the correct area of a circle.\n\nTry the intergral, see if it makes sense.  Then sketch the figure and estimate it's area to compare.  My confidence is increasing as I write this.
957254
Insert / Shapes / Basic. Choose a circle from the options. Drag your mouse on the paper to make the circle. You can repeat those steps for more circles, or just copy/paste the one you have over and over. The default circle is usually colored and will not be transparent. If you need to see the overlapped areas, select the circle, right click the mouse and choose "properties" and under "fill" click on the "X" which removes any fill or color. \n\n(If you want all transparent circles, just create ONE circle and remove the fill and THEN copy it and paste it for as many as you want.)\n\nTo add text to a circle, select it, right click, and choose "add text."
855656
I'm assuming you're talking about cutting a circle into quadrants? This might be the long way to do it, but I would first find the center of the circle. Here's a web page for how to do that:\n\nhttp://www.makeitsolar.com/science-fair-ideas/90-find-circle-center.htm\n\nThen you draw your diameter. (there's half)\n\nFinally, find and draw a line perpendicular to your diameter that crosses through the center of the circle.\n\nLike I said - probably the long way to do it, but I'm a very visual person when it comes to geometry. I like to draw everything out.
381185
Draw a circle and a line down the middle cutting it in half.  Show that there are 2 pieces, and 1 out of two = 1/2.\n\nNow draw a line across cutting it into fourths.  Show that there are 4 pieces, and 2 out of 4 = 2/4, which is still 1/2\n\nYou can also use this circle to show that 2/2 and 4/4 equal 1 whole circle.  Anything multiplied by 1 is equal to itself (3*1=3, 5*1=5) so if you multiply a fraction by the same number on top and bottom, you are really multiplying it by 1.  Therefore, all the multiples of that fraction are equivalent.\n\nProve it with a calculator.  Take 3/4 and multiply it by 3/3 (which =9/12), 5/5 (=15/20) and then show that on the calculator all of these equal .75
471030
You will have a list of information, say the composition of x is 10%A, 33%B, 40%C and 17% D.\n\nConvert all these into a fraction of 360. (As a circle is 360 degrees)\n\nSo (10/100) x 360 = 36\nThis means that section A will have an angle of 36 degrees.\n\netc.\n\nDraw a circle then draw a single line from the centre to the edge. Use a protractor to measure 36% and draw a line.\n\nRepeat with all the other values until you have filled the circle.\n\nHope this helps.
349917
Cut out a cardboard circle, draw colors on that or glue the color wheel on it.\nPut a needle through the centre (as the axis) and use 2 forks to hold the needle.\n\nIf you need a lot of spin, tie a rope around the needle and pull
351984
If you have microsoft word...on the DRAWING toolbar there is an opiton to draw an oval. Hope this helps.
1147102
pi*(r^2)\n\nIt doesn't matter which unit you use, just make sure you're consistent.