# Study sets matching "geometry circles chapter 12"

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If a line is tangent to a circle, then

If a line in the plane of a circle is p…

If 2 tangent segments to a circle share…

Within a circle or in congruent circles…

The line is perpendicular to the radius at the point of tangen…

The line is a tangent to the circle.

The 2 segments are congruent.

Congruent arcs.

If a line is tangent to a circle, then

The line is perpendicular to the radius at the point of tangen…

If a line in the plane of a circle is p…

The line is a tangent to the circle.

Circle

Congruent Circles

Radius

Diameter

The set of all points in a plane that are the same distance fr…

Two circles that have congruent radii.

The distance from the center to any point on the circle.

A straight line passing from side to side through the center o…

Circle

The set of all points in a plane that are the same distance fr…

Congruent Circles

Two circles that have congruent radii.

Circle

center

radius

Diameter

A round plane figure whose boundary consists of points equidis…

The point at the middle of the circle

A straight line segment that reaches from the center of the sh…

A straight line segment passing through the center of a shape…

Circle

A round plane figure whose boundary consists of points equidis…

center

The point at the middle of the circle

radius

pi

circle

circumference

a segment with one endpoint on the circle and one endpoint at…

the ratio of a circle's circumference to its diameter

the locus of points in a plane that are a fixed distance from…

the distance around a circle

radius

a segment with one endpoint on the circle and one endpoint at…

pi

the ratio of a circle's circumference to its diameter

Circle

Diameter

Radius

Congruent Circles

Set of all points equidistant from the given point called "Cen…

Segment from one side of the circle to the other side.

Half of the diameter; One endpoint at the center, other on the…

Circles that have a congruent radii.

Circle

Set of all points equidistant from the given point called "Cen…

Diameter

Segment from one side of the circle to the other side.

Tangent

Theorem 12-1

Theorem 12-3

Chords

A line that hits a circle only at one point

If a line is tangent to the circle, then it is perpendicular w…

If two tangent segments share a common endpoint, then they are…

A segment whose endpoints are on a circle

Tangent

A line that hits a circle only at one point

Theorem 12-1

If a line is tangent to the circle, then it is perpendicular w…

Adjacent Arcs:

Arc:

Arc length:

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

An unbroken part of a circle consisting of two points on the c…

The distance along an arc measured in linear units

Adjacent Arcs:

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

Arc:

An unbroken part of a circle consisting of two points on the c…

Tangent line

Point of tangency

Perpendicular, radius

(n-2)180

a line in the plane of the circle that intersects the circle i…

the point where a circle and a tangent intersect

A tangent is ______ to the ______ of the circle at the point o…

Sum of angle measure formula

Tangent line

a line in the plane of the circle that intersects the circle i…

Point of tangency

the point where a circle and a tangent intersect

tangent

point of tangency

If a line is tangent to a circle...

If a line in the plane of a circle is p…

a line in the plane of the circle that intersects the circle i…

the point where a circle and a tangent intersect

Then the line is perpendicular to the radius at the point of t…

Then the line is tangent to the circle

tangent

a line in the plane of the circle that intersects the circle i…

point of tangency

the point where a circle and a tangent intersect

radius

sphere

semicircle

point of tangency

the given distance from the center of the circle to a point on…

the set of all points equidistant from a given point

half a circle; arc that has a measure equal to 180°

the point of intersection of a tangent and a circle

radius

the given distance from the center of the circle to a point on…

sphere

the set of all points equidistant from a given point

If a line is tangent to a circle, then

If a line in the plane of a circle is p…

If 2 tangent segments to a circle share…

Within a circle or in congruent circles…

The line is perpendicular to the radius at the point of tangen…

The line is a tangent to the circle.

The 2 segments are congruent.

Congruent arcs.

If a line is tangent to a circle, then

The line is perpendicular to the radius at the point of tangen…

If a line in the plane of a circle is p…

The line is a tangent to the circle.

the interior of a circle

the exterior of a circle

chord

secant

the set of all points inside the circle

the set of all points outside of the circle

a segment whose endpoints lie on a cicle

a line that intersects a circle at 2 points

the interior of a circle

the set of all points inside the circle

the exterior of a circle

the set of all points outside of the circle

Tangent line

If two tangent segments to a circle sha…

Within a circle or in congruent circles…

Within a circle or in congruent circles…

Perpendicular to the radius at the point of tangency

Congruent

Congruent arcs

Chords

Tangent line

Perpendicular to the radius at the point of tangency

If two tangent segments to a circle sha…

Congruent

Circle

Radius

Chord

Diameter

The set fo coplanar points equidistanet froma common point ... (T…

The distance from the center to any point on a circle (or sphe…

Segment with endpoints on the circle

Longest possible chord in a circle; contains the center point

Circle

The set fo coplanar points equidistanet froma common point ... (T…

Radius

The distance from the center to any point on a circle (or sphe…

chord

secant

tangent

point of tangency

segment whose endpoints lie on a circle

line that intersects a circle at two points

line in the same plane as a circle that intersects the circle…

What is the point at which a tangent intersects a circle calle…

chord

segment whose endpoints lie on a circle

secant

line that intersects a circle at two points

Circle

Concentric

Chord

Diameter

A circle is the set of all points in a plane that are at a giv…

Circles are concentric iff they lie in the same plane and have…

A chord of a circle is a line segment that joins two points on…

The diameter of a circle is a chord that contains the center

Circle

A circle is the set of all points in a plane that are at a giv…

Concentric

Circles are concentric iff they lie in the same plane and have…

Center of a Circle

Radius

Diameter (segment)

Chord

a point equidistant to every point on a circle and named by ce…

segment joining center of circle to a point on the circle

segment joining two points on the circle and must pass through…

a segment joining 2 points on a circle but does not go through…

Center of a Circle

a point equidistant to every point on a circle and named by ce…

Radius

segment joining center of circle to a point on the circle

interior of a circle

exterior of a circle

chord

secant

the set of all points inside the circle

the set of all points outside the circle

a segment whose endpoints lie on a circle

a line that intersects a circle at two points

interior of a circle

the set of all points inside the circle

exterior of a circle

the set of all points outside the circle

tangent line

point of tangency

chord

central angle

a line in the plane of a circle that intersects the circle in…

the point where a tangent and a circle intersect

a segment whose endpoints are on the circle

an angle whose vertex is the center of a circle

tangent line

a line in the plane of a circle that intersects the circle in…

point of tangency

the point where a tangent and a circle intersect

Chord

Secant

Tangent of a Circle

Point of a Tangency

A segment whose endpoints lie on a circle

A line that intersects a circle at two points

A line in the same plane as a circle that intersects it at exa…

The point where the tangent and a circle intersect

Chord

A segment whose endpoints lie on a circle

Secant

A line that intersects a circle at two points

12.1 interior of a circle

12.1 exterior of a circle

12.1 chord

12.1 secant

the set of all points inside the circle

the set of all points outside the circle

a segment whose endpoints lie on a circle

a LINE that intersects a circle at two points

12.1 interior of a circle

the set of all points inside the circle

12.1 exterior of a circle

the set of all points outside the circle

Circle

Radius

Diameter

Chord

The set of points equidistant from a given point, called the c…

A segment/length from the center of the circle to the edge of…

The segment with both endpoints on the edge of the circle that…

A segment with both endpoints on the edge of the circle.

Circle

The set of points equidistant from a given point, called the c…

Radius

A segment/length from the center of the circle to the edge of…

12.1 interior of a circle

12.1 exterior of a circle

12.1 chord

12.1 secant

the set of all points inside the circle

the set of all points outside the circle

a segment whose endpoints lie on a circle

a line that intersects a circle at two points

12.1 interior of a circle

the set of all points inside the circle

12.1 exterior of a circle

the set of all points outside the circle