hillleft.blogg.se - Triangle inside a circle geometry

No further precision will ever be needed of you. I would wager that you could do it, too, given a month or a couple of months!) For the GMAT, you need only remember that (Once, for amusement, I memorized the first 1,000 digits of pi. The number pi, like any irrational number, consists of an infinite number of non-repeating digits. Here, pi is the constant number represented by the Greek letter pi equal to approximately 3.14. The area of a circle is given by the equation: Any line that is tangent to a circle is perpendicular to a radius or diameter at that point, as in the figure above.

Any chord that is not a diameter of a circle will be shorter than the diameter of the circle.

For the GMAT, the only key facts about these other lines are: The figure also shows a chord, a secant (which is quite similar to a chord), and a tangent line. The figure above shows a circle with a diameter and a radius (of infinitely many possible diameters and radii) shown. It is always equal in length to two radii. The diameter is a line segment that connects two points on the circle and goes through the center. The radius, in other words, is not a property of a circle – it is the defining property of a circle. The distance between any of the points and the center is the radius r.

A circle is the set of all points that are at an equal distance from a center point.