# Study sets matching "geometry circle math"

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Inscribed Angle

Central Angle

Tangent

Chord

An angle formed by two chords in a circle which have a common…

An angle formed by two radii whose vertex is at the centre of…

A line that intersects the circle at one point.

A line segment that joins two points on the circumference of a…

Inscribed Angle

An angle formed by two chords in a circle which have a common…

Central Angle

An angle formed by two radii whose vertex is at the centre of…

Circle

Radius

Central Angle

Arc

a set of all points in a plane that are equidistant from a fix…

a line segment from the center of the circle to a point on the…

an angle whose vertex is the center of the circle

the part of the circle between two points on the circle

Circle

a set of all points in a plane that are equidistant from a fix…

Radius

a line segment from the center of the circle to a point on the…

Radius

Diameter

Chord

circumference

Any straight line from the center of a circle to its circumfer…

the distance measured from one point on a circle to another go…

Any straight line linking two points on a circle`s circumferen…

The total length of the outside edge (perimeter) of a circle.

Radius

Any straight line from the center of a circle to its circumfer…

Diameter

the distance measured from one point on a circle to another go…

Two Tangent Theorem

Chord-Chord Angle

Secant-Tangent Angle OR Tangent-Tangent…

Area of a sector

If 2 tangent segments are drawn to a circle from an external p…

The measure of a chord-chord angle equals half the sum of the…

The measure of an angle whose vertex is OUTSIDE a circle is ha…

Two Tangent Theorem

If 2 tangent segments are drawn to a circle from an external p…

Chord-Chord Angle

The measure of a chord-chord angle equals half the sum of the…

Equal arcs

Equal chords

A perpendicular line from the centre of…

Equal chords are equidistant

subtend equal angles at the centre (converse)

subtend equal angles at the centre (converse)

bisects the chord

from the centre of the circle (converse)

Equal arcs

subtend equal angles at the centre (converse)

Equal chords

subtend equal angles at the centre (converse)

Tangent-Radius Property

Angle-Sum Property

Pythagorean Theorem

Centre Point

A tangent is perpendicular (forms right angle) to the radius d…

The sum of the 3 angles in a triangle is always 180°

a² + b² = c²

The point at the perfect centre of the circle.

Tangent-Radius Property

A tangent is perpendicular (forms right angle) to the radius d…

Angle-Sum Property

The sum of the 3 angles in a triangle is always 180°

Inscribed Angle

Central Angle

Tangent

Chord

An angle formed by two chords in a circle which have a common…

An angle formed by two radii whose vertex is at the centre of…

A line that intersects the circle at one point.

A line segment that joins two points on the circumference of a…

Inscribed Angle

An angle formed by two chords in a circle which have a common…

Central Angle

An angle formed by two radii whose vertex is at the centre of…

Cyclic quadrilateral

Same segment

Semicircle

Centre

Opposite angles in a (?) add up to 180 degrees

Angle in the (?) are equal

The angle in (?) is 90

The angle at the (?) of a circle is twice the angle at the cir…

Cyclic quadrilateral

Opposite angles in a (?) add up to 180 degrees

Same segment

Angle in the (?) are equal

Chord

Segment

Equidistant

Perpendicular Lines

A line segment which joins two points on the circumference of…

a chord which divides a circle into two segments

an equal distance from

lines that intersect at right angles

Chord

A line segment which joins two points on the circumference of…

Segment

a chord which divides a circle into two segments

Radius

Diameter

Chord

circumference

Any straight line from the center of a circle to its circumfer…

the distance measured from one point on a circle to another go…

Any straight line linking two points on a circle`s circumferen…

The total length of the outside edge (perimeter) of a circle.

Radius

Any straight line from the center of a circle to its circumfer…

Diameter

the distance measured from one point on a circle to another go…

Circle

Cord

Radius

Diameter

All points on the edge of a circle are the same distance from…

A line segment that joins two points on a circle

The length of a line segment from a circle's center to its per…

A cord that passes through the center of the circle or The lon…

Circle

All points on the edge of a circle are the same distance from…

Cord

A line segment that joins two points on a circle

Radius

Diameter

Chord

circumference

Any straight line from the center of a circle to its circumfer…

the distance measured from one point on a circle to another go…

Any straight line linking two points on a circle`s circumferen…

The total length of the outside edge (perimeter) of a circle.

Radius

Any straight line from the center of a circle to its circumfer…

Diameter

the distance measured from one point on a circle to another go…

Radius

Diameter

Chord

circumference

A segment whose endpoints are the center of the circle and a p…

the distance measured from one point on a circle to another go…

Any straight line linking two points on the circle

The total length of the outside edge (perimeter) of a circle.

Radius

A segment whose endpoints are the center of the circle and a p…

Diameter

the distance measured from one point on a circle to another go…

Theorem 10.1

Theorem 10.2

Postulate 23: Arc Addition Postulate

Theorem 10.3

In a plane, a line is tangent to a circle if and only if the l…

Tangent segments from a common external point are congruent

Measure of an arc formed by 2 adjacent arcs equals the sum of…

In the same circle or in congruent circles two minor arcs are…

Theorem 10.1

In a plane, a line is tangent to a circle if and only if the l…

Theorem 10.2

Tangent segments from a common external point are congruent

Radius

Diameter

Chord

circumference

Any straight line from the center of a circle to its circumfer…

the distance measured from one point on a circle to another go…

Any straight line linking two points on a circle`s circumferen…

The total length of the outside edge (perimeter) of a circle.

Radius

Any straight line from the center of a circle to its circumfer…

Diameter

the distance measured from one point on a circle to another go…

Diameter/raduis

Radius

Perpendicular Bisector

Chord

A line segment that passes through the centre of the circle an…

Half the circle

Forms a 90 degree angle and bisects the chord into two equal p…

A line segment that joins two points on a circle

Diameter/raduis

A line segment that passes through the centre of the circle an…

Radius

Half the circle

Radius

Diameter

Chord

circumference

A segment whose endpoints are the center of the circle and a p…

the distance measured from one point on a circle to another go…

Any straight line linking two points on the circle

The total length of the outside edge (perimeter) of a circle.

Radius

A segment whose endpoints are the center of the circle and a p…

Diameter

the distance measured from one point on a circle to another go…

diameter

radius

chord

arc

line passing through the centre of a circle with both endpoint…

measures from the centre of a circle to the outside edge of th…

segment with both endpoints on the circumference

part of the circumference. 2 points divide circumference into…

diameter

line passing through the centre of a circle with both endpoint…

radius

measures from the centre of a circle to the outside edge of th…

Radius

Diameter

Chord

circumference

Any straight line from the center of a circle to its circumfer…

the distance measured from one point on a circle to another go…

Any straight line linking two points on a circle`s circumferen…

The total length of the outside edge (perimeter) of a circle.

Radius

Any straight line from the center of a circle to its circumfer…

Diameter

the distance measured from one point on a circle to another go…

Circle

Radius

All circles are similar

Circumference

The set of all points in a plane that are a given distance fro…

Segment, or length of the segment, from center of circle to th…

Any circle is a dilation of any other circle.

Distance around a circle. ... C = 2r x pi OR C = d x pi

Circle

The set of all points in a plane that are a given distance fro…

Radius

Segment, or length of the segment, from center of circle to th…

Chord

Diameter

Secant

Tangent

A line segment that ends at the edges of a circle

A chord containing the center of a circle

A line that intersects a circle at two points

A line that passes through only one point on a circle

Chord

A line segment that ends at the edges of a circle

Diameter

A chord containing the center of a circle

Both line endpoints touches the circles

Makes an angle at the centre of the cir…

The angle is touching the circle and so…

2 triangles are the same if they share…

Chord

Central angle

Inscribed angle

Arc

Both line endpoints touches the circles

Chord

Makes an angle at the centre of the cir…

Central angle

Circle Geometry (1)

Circle Geometry (2)

Circle Geometry (3)

Circle Geometry (4)

A Tangent and a Radius meet at 90 degrees

Tangents from the Same Point are the Same Length

The Perpendicular Bisector of a Chord passes through the Centr…

Two Radii from an Isosceles Triangle

Circle Geometry (1)

A Tangent and a Radius meet at 90 degrees

Circle Geometry (2)

Tangents from the Same Point are the Same Length