module 2 topic 1 vocab

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33 Terms

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Chord
A segment whose endpoints are points on a circle
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Concurrent
Three or more lines, rays, or line segments that intersect at a single point
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Tangent
A line that intersects a circle in exactly one point
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Inscribed quadrilateral
A quadrilateral whose vertices all lie on a single circle
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Radius
A line segment from the center of a circle to a point on the circle
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Secant
A line that intersects a circle at two points
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Base angles
The angles between the base and the congruent sides of an isosceles triangle or trapezoid
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Inscribed angle
An angle whose vertex is on a circle and whose sides contain chords of the circle
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Remote interior angles
The two interior angles of a triangle that are not adjacent to the specified exterior angle
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Circumscribed angle
An angle whose two sides are tangent to the circle
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Concave polygon

A polygon is if and only if at least one of its interior angles is greater than 180°

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Convex polygon
A polygon that contains all of the line segments connecting any pair of points inside it
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Intercepted arc
The part of a circle that lies in the interior of an angle, with endpoints at the intersections of the sides of the angle and the circle
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Exterior angle
An angle that forms a linear pair with an interior angle of the polygon
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Circumcenter
The point of concurrency of the three perpendicular bisectors of a triangle
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Circumscribed circle
A circle that passes through all the vertices of a polygon
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Central angle
An angle with its vertex at the center of a circle
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Isosceles trapezoid
A trapezoid with congruent legs
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Orthocenter
The point of concurrency of the three altitudes of a triangle
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Triangle inequality theorem
States that the sum of the lengths of any two sides of a triangle is greater than the length of the third side
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Coincident
When two segments lie exactly on top of each other
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Centroid
The point of concurrency of the three medians of a triangle; also known as the center of gravity
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Minor arc
An arc with a measure less than 180 degrees
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Kite
A quadrilateral with two pairs of equal adjacent sides
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Point of concurrency
The point at which concurrent lines, rays, or line segments intersect
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Altitude
A line segment that is perpendicular to a side of the triangle and has one endpoint at the opposite vertex
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Interior angle
An angle inside the polygon, between two adjacent sides
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Inscribed polygon
A polygon drawn inside another polygon or circle in which all the vertices of the interior polygon lie on the outer figure
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Median
A line segment that connects a vertex of a triangle to the midpoint of the opposite side
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Midsegment
Any line segment that connects two midpoints of the sides of a polygon
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Major arc
An arc with a measure greater than 180 degrees
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Diameter
A line segment passing through the center of a circle with endpoints on the circle
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Incenter
The point of concurrency of the three angle bisectors of a triangle