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Geometry Vocab 9

TermDefinition
Circle A circle is the set of all points in a two-dimensional plane that are equidistant (at the same distance) from a fixed point, called the center
center the fixed point in the interior of a circle that is equidistant (the same distance) from all points on its circumference
radius a line segment in geometry connecting the center of a circle or sphere to any point on its boundary
chord a straight line segment whose endpoints both lie on a circle (or any curve)
secant a straight line segment that intersects a curve at two or more points
tangent a straight line that touches a curve or circle at exactly one point, known as the point of tangency, without intersecting or passing through the interior of the curve at that point
central angle an angle whose vertex is the center of a circle and whose sides (arms) are two radii that intersect the circle at distinct points
minor arc a portion of a circle's circumference that measures less than 180 degrees
major arc a portion of a circle's circumference that measures more than 180 degrees
semicircle a portion of a circle's circumference that measures 180 degrees
congruent circles circles that have the same radius, meaning they are identical in size regardless of their position in a plane
congruent arcs portions of a circle (or identical circles) that have the same measure in degrees and equal length
inscribed angle an angle formed by two chords that share a common endpoint (the vertex) located on the circumference of a circle
intercepted arc the portion of a circle's circumference that lies in the interior of an angle (such as an inscribed or central angle) whose sides intersect the circle
standard equation of a circle (x-h) squared+ (y-k) squared= r squared
Created by: Violet Snave
 

 



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