## Geometry Chapter 8 Terms

##### Created by:

noakim96  on May 4, 2012

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# Geometry Chapter 8 Terms

 arctwo points and a continuous part of a circle between the points
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#### Definitions

arc two points and a continuous part of a circle between the points
center of a circle the point equidistant from all points of the circle
chord a line segment that joins two points on a circle
circle the locus of points in a plane that are equidistant from a given point
circumference the distance around a circle
circumscribed circle a circle on which every vertex of a polygon lies
concentric circles two coplanar circles with the same center
diameter a segment, or the length of a segment, that contains the center of the circle and has endpoints on the circle
great circle a circle on a sphere whose center is the center of the sphere
inscribed circle a circle that is tangent to every side of a polygon is inscribed in the polygon
inscribed angle an angle with its vertex on a circle and sides that contain chords of the circle
major arc an arc whose measure is greater than 180 degrees
minor arc an arc whose measure is less than 180 degrees
pi the ratio of the circumference of a circle to its diameter (3.14)
radius a segment, or the length of a segment, from the center to any point on the circle
secant line a line that intersects a circle or sphere in two points
sector a region bounded by two radii and their intercepted arc on a circle
semicircle half of a circle with the angle measure of 180 degrees
sphere the locus of points in space a given distance from a point, the center of the sphere (aka a 3-d circle)
tangent line a line that intersects a circle or sphere at exactly one point is tangent to the circle or sphere

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