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 ShapesFind the equation of a circle using the formula (x-h)squared+(y-k)squared=r squared. Know that h and k represent the coordinates for the center, with h being the x value, k being the y value and r being the radius.
Full Answer >The diameter of a circle is the length of a straight line going from one side of a circle to the opposite side. To measure the diameter, simply choose two points on the edge of a circle that are directly across from each other, and measure the distance between these points. You will need a measuring device to perform this task.
Full Answer >Find the diameter of a circle with a given circumference by solving for the formula "d=C/pi," where d is the diameter, C is the circumference and pi is 3.1459. For this problem, find the diameter of a circle that has a circumference of 18.8754 inches.
Full Answer >A circle is not a polygon because it does not conform to the definition of a polygon. The definition of a polygon is a closed figure formed by straight lines or straight sides. Although the circle is a closed figure, it is not formed by straight line segments.
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