# 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…

Radius

Diameter

Circumference

pi

The distance from the center of a circle to any point on the c…

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

Distance around a circle

The ratio of a circle's circumference compared to its diameter…

Radius

The distance from the center of a circle to any point on the c…

Diameter

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

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…

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°

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

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…

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

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…

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

Center Circle (5)

Tangent (3)

Cyclic Quads Chords (4)

Triangles (2)

Angle in semi circle... Angle at center... Radii - Isos Triangle... Lin…

Tan-Chord Theorm... Tan perp radius = 90'... Tan from same point are…

Opp L's are supplementary ... Ext L's cyclic quad... Angles in the s…

Add up to 180'... Ext angles of Triangle = sum of interior opp

Center Circle (5)

Angle in semi circle... Angle at center... Radii - Isos Triangle... Lin…

Tangent (3)

Tan-Chord Theorm... Tan perp radius = 90'... Tan from same point are…

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

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

Tangent line

Point of tangency

Tangent radius property

Chord

Line that intersects a circle at only one point

Where tangent intersects circle

Tangent to circle is perpendicular to radius, creating 90degre…

Line segment that joins 2 points on a circle

Tangent line

Line that intersects a circle at only one point

Point of tangency

Where tangent intersects 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…

If 2 tangent segments are drawn to a ci…

The measure of an angle formed by 2 int…

The measure of an angle whose vertex is…

The measure of an angle formed by a tan…

then those segments are congruent.

is equal to half the sum of the measures of the intercepted ar…

is half of the difference of the two intercepted arcs.

is half the measure of the intercepted arc.

If 2 tangent segments are drawn to a ci…

then those segments are congruent.

The measure of an angle formed by 2 int…

is equal to half the sum of the measures of the intercepted ar…

Tangent and Radius Theorem

Tangent from an external point Theorem

Angle in a semi-circle Theorem

Angle at the Centre Theorem

A tangent and a radius meet at a right angle

Tangents from an external point are equal in length

Diameter always creates a 90 degree angle

The angle subtended at the centre from arc AB is double the an…

Tangent and Radius Theorem

A tangent and a radius meet at a right angle

Tangent from an external point Theorem

Tangents from an external point are equal in length

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

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…

radius

diameter

circumference

chord

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

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

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

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

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…