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common tangent

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congruent circles

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a segment whose endpoints are the center and any point on a circle radius

chord that contains the center of a circle diameter

the point from which all points on a circle are equidistant center

an angle whose vertex is the center of a circle central angle

the distance around a circle circumference

an angle whose vertex is on a circle and whose sides contain chords of the circle inscribed angle

a segment whose endpoints are on a circle chord

a line that intersects a circle in two points secant line

an arc with endpoints that are the endpoints of a diameter semicircle

a line in the plane of a circle that intersects the circle at exactly one point tangent line

if the endpoints of a chord or arc lie on the sides of an inscribed angle, the chord or arc is said to subtend the angle subtend

coplanar circles that intersect in one point tangent circles

an arc that lies between two lines, rays or segments intercepted arc

an angle whose sides are tangent to a circle circumscribed angle

a part of the circumference of a circle arc

a circle that contains all the vertices of an inscribed polygon circumscribed circle

coplanar circles that have a common center concentric circles

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A portion of a circle defined by two endpoints arc

A segment with endpoints at the center and on the circle radius

A segment with endpoints on the circle chord

An irrational number =C/d pi

Set of points in a plane equidistant from the center circle

A line in the same plane as the circle which intersects the circle in exactly on point tangent

When every side of the polygon is tangent to the circle circumscribedpolygons

A chord that passes through the center diameter

Region bounded by an arc and a chord segmentofcircle

Region bounded by a central angle and its intercepts arc sectorofcircle

An arc greater than 180 degrees majorarc

Arc formed by an inscribed angle interceptedarc

When all vertices of a polygon lie on the circle inscribed

When two circles have congruent radii congruent

A line that intersects a circle in exactly two points secant

Has a vertex on a circle and sides that contains cords of a circle inscribedangle

Point where a tangent line touches a circle pointoftangency

A segment of a secant line that has exactly one endpoint on the circle secantsegment

A secant segment that lies in the exterior of the circle externalsecantsegment

Segment of a tangent with one endpoint on the circle tangentsegment

Arcs in a circle that have exactly one point in common adjacentarcs

Line, ray, or segment this is tangent to two circles in the same plane commontangent

Arcs with the same measurement congruentarcs

An arc equal to 180 degrees semicircle

Two segments created by two chords intersecting in a circle chordsegment

When circles are coplanar and have the same center concentric

An arc less than 180 degress minorarc

An angle with the vertex in the center of the circle centralangle

A circle is ________ about a polygon if it contains all vertices of that polygon circumscribed

Distance between two endpoints along an arc measured in linear units arclength

Distance around a circle circumference

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a segment whose endpoints are the center of the circle and a point on the circle radius

a segment whose endpoints are on the circle chord

a chord that contains the center diameter

circles that lie in the same plane, have the same center, and have radii of different lengths concentric

part of the circle in the interiour of the central angle and has a measure less than 180 minor arc

part of the circle in the exterior of the central angle major arc

congruent arcs whose endpoints lie on a diameter of the circle semicircle

a polygon that has every vertex of the polygon on the circle inscribed

arcs of a circle whith one point in common adjacent arcs

a set of points along a circle defined by a central angle arc

an angle whose vertex is the center of a circle and whose sides intersect the circle central angle

the distance around a circle circumference

a polygon with each side tangent to a circle circumscribed

a set of points that satisfy a given condition locus

a region of a circle bounded by a central angle and its corresponding arc sector

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This is the measure of its central angle Arc

A segment whose endpoints are on the circle Chord

If the vertex of the angle is on the circle and the sides of the angle are chords of the circle Inscribed Angle

A line , ray or segment that intersects a circle at two points Secant

An arc smaller than a semi circle Minor Arc

The set of all points in a plane that are a given distance the radius , from a given point , the center Circle

Angle whose vertex is the center of the circle Central Angle

A segment that contains the center of the circle and whose end points are on the circle Diameter

Any segment with one end point on the circle and the other endpoint at the center of the circle Radius

A line , segment or ray in the plane of the circle that intersects the circle in exactly one point. Tangent

An arc that is larger than a semi circle Major Arc

About a polygon if the vertices of the polygon are on the circle. Circumscribed

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the outer boundary, especially of a circular area; perimeter circumference

a straight line extending from the center of a circle or sphere to the circumference or surface radius

a plane figure bounded by two radii and the included arc of a circle. sector

half of a circle; the arc from one end of a diameter to the other. semicircle

any particular extent of space or surface; part area

touching at a single point, as a tangent in relation to a curve or surface. tangent

the line segment between two points on a given curve. chord

a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end. diameter

an intersecting line, especially one intersecting a curve at two or more points secant

is an arc of a circle having measure greater than or equal to 180 degrees arc major

in a circle determines an arc central angle

is an arc of a circle having measure less than or equal to ( radians) arc minor

is an angle formed by two chords in a circle which have a common endpoint inscribed angle

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Objects that share the same center Concentric

A point where all point are equal distance from Center

Straight line who's endpoint a lie on the edges of the circle Chords

A straight line segment that passes through the center of the circle and whose endpoints lie on the circle Diameter

The length of a line segment from its center to its perimeter. Radius

A straight line that intersects a curve at two or more points Secant

A line that touches the circle at exactly one point, never entering the circle's interior. Tangent

The set of all points in a plane that are at a given distance from a given point Circle

A part of the circumference of a circle or other curve. Arc

An inscribed angle is the angle formed in the interior of a circle Inscribed Angle

Circle which passes through all the vertices of the polygon. Circumscribed Angle

A line, curve, or surface meeting another line, curve, or surface at a common point and sharing a common tangent line or tangent plane at that point Point of Tangency

Smaller of the two arcs formed when a circle is divided into two unequal parts Minor Arc

The larger of the two arcs formed when a circle is divided into two unequal parts. Major Arc

One-dimensional locus of points that forms half of a circle Semi-Circle

Straight lines from its extremities are joined at that point: Subtend

The angle formed the interior of a circle when two secant lines (or, in a degenerate case, when one secant line and one tangent line of that circle) intersect on the circle. Inscribed Angle

When two straight lines cross a circle, the part of the circle between the intersection points is called the Intercepted Arc

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Set of all points in a plane that are equidistant fron a point. Circle

Coplanar circles that intersect in one point. Tangent circles

Segment whose endpoints are the center and any point on a circle. Radius

Segment whose endpoints are on a circle. Chord

Chord that contains the center of the circle. Diameter

line that intersects a circle in tow points Secant

line in the plane of a circle that intersect the circle in exactly one point. Tangent

Point where the tangent intersects the circle. Point of Tangency

Coplanar circles that have a common center. Concentric circles

A mathematical constant commonly approximated as 3.14159. Pi

An angle whose vertex is the center of the circle. Central angle

It is an arc with endpoints that are the enpoints of a diameter. Semicircle

Two arcs of the same circle that intersect at exactly one point. Adjacent arcs

An angle whose vertex is on a circle and whose sides contain chords of the circle. Inscribed angle

An arc that lies between two lines, rays, or segments. Intercepted arc

A polygon when all its vertices lie on a circle. Inscribed polygon

The circle that contains the vertices. Circumscribed circle

Angle whose sides are tangent to a circle. Circumscribed angle

Segment that is tangent to a circle at an endpoint. Tangent segment

Segment that contains a chord of a circle and has exactly one Secant segment

The part of a secant segment that is outside the circle. External segment

When two chords intersect in the intirior of a circle and each chord is divide in segments. Segments of the chord

It is a closed curve or circular object is the linear distance around its edge. Circumference

Real number that can't be expressed as a ratio of integers as a fraction. Irrational number

Mathematician who used Pi symbol for first time to represent the platonic concept. William Jones

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Arc

Central Angle

Circle

Circle Graph

Concentric Circles

Congruent Chords

Congruent Circles

Exterior of a Circle

Inscibed Angle

Intercepted Arc

Interior of a Circle

Major Arc

Minor Arc

Pi

Radias

Secant

Secant Line

Semi-Circle

Tangent Line

Venn Diagram