One easy method of drawing an elliptical circle includes finding two focus points, attaching a piece of string between them and running a pencil in all directions as far as the string allows. This is not technically considered a true Euclidean construction, but it is a practical and quick way to draw an ellipse with accurate dimensions.
Know MoreThe width of an ellipse is called the major axis. The height of an ellipse is called the minor axis. This construction is best done on graph paper. First, set a compass to half of the desired major axis length. Place the point of the compass in the center of the page and mark the distance in each direction. Then, do the same with half the distance of the minor axis by placing the compass point in the center and marking two points up and down. Reconfigure the compass length back to the length of half the major axis. Place the point of the compass at one end of the minor axis and mark a point on each side of the major axis. These two points are known as the focal points.
Place a push pin at each end of the major axis and tie a string between them so that it is taut. Then, leaving the string attached, relocate the push pins at each focal point. As the distance between the two focal points is shorter than the distance of the major axis, the string is no longer taut. Place a pencil point against the string and pull the string taut with the pencil. Keeping the string taut at all times, move the pencil in a wide arc. This draws an ellipse.
Learn more about ShapesAccording to Programmer Interview, the circle must be cut into quarters using the first two cuts, and then the quarters must be stacked into one pile before making the last cut. This is done by stacking the pieces of the circle.
Full Answer >An apothem of a triangle depends upon either the length of one of its side or the radius of a circle that fits inside it. There are two methods of determining an apothem through known measurements.
Full Answer >There are exactly 360 degrees in any circle. A circle is a two dimensional shape that consists of a consistently curved line that continues until it meets itself.
Full Answer >The formula for circumference of a circle is 2πr, where “r” is the radius of the circle and the value of π is approximately 22/7 or 3.14. The circumference of a circle is also called the perimeter of the circle.
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