arc meaning in math
1 An arc of measure less than 180 degrees is a minor arc. 2  The arc length(L) of a circle of radius r and subtending an angle θ with the center of the circleis given as L = rθ. Please provide your email for a free trial as a Teacher or Student. This trial will be valid for the current academic year (2015-16). An email to this address includes the password to login to the full web application. More About Arc. 1  An arc of measure greater than 180 degrees is a major arc. 2  An arc of measure less than 180 degrees is a minor arc. 3  The arc length(L) of a circle of radius r and subtending an angle θ with the center of the circleis given as L = rθ. 1 An arc of measure greater than 180 degrees is a major arc. 2  An arc of measure less than 180 degrees is a minor arc. 3  The arc length(L) of a circle of radius r and subtending an angle θ with the center of the circleis given as L = rθ. Definition of Arc. An Arc is a curved line that is a part of a circle. An Arc is a part of the circumference of a circle. The angle measure is the angle formed by the arc at the center of the circle. It is indicated by the small letter M in front of the name. For example is read as the arc AB has a measure of 35 degrees. Arc Length. Definition: The distance along the curved line making up the arc. (See also Angle measure of an arc .). Try this Drag one of the orange dots that define the endpoints of the blue arc. The arc length will be continuously calculated. The arc length is the measure of the distance along the curved line making up the arc. It is longer than the straight line distance between its endpoints (which would be a chord). The radius of the circle of which the arc is a part. See Radius of an Arc for ways to calculate the arc radius when you know other properties of the arc. Central Angle. The angle subtended by the arc to the center of the circle of which it is a part. An arc is a portion of the circumference of a circle. In the figure above, the arc is the blue part of the circle. Strictly speaking, an arc could be a portion of some other curved shape, such as an ellipse, but it almost always refers to a circle. To avoid all possible mistake, it is sometimes called a circular arc. Notice that this naming can be ambiguous. For example it may mean the major arc AB, where you go the long way around the bottom of the circle. Unless stated otherwise, it always means the minor arc-the shortest of the two. If you want to indicate the major arc, add an extra point and use three letters in the name.
A curved line that is a part of a circle.