# Study sets matching "math geometry circles"

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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…

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…

Radius

Diameter

Chord

Semi-Circle

Distance from center to any point on circle

Distance across circle through the center

Line segment inside the circle touching two points on the circ…

1/2 of a circle

Radius

Distance from center to any point on circle

Diameter

Distance across circle through the center

Tangent

Diameter

Circumference

Sector

A straight line touching a curve once at a given point.

A straight line passing through the centre of a circle to touc…

The distance around a circle.

Section of a circle bounded by two radii (radius) and an arc.

Tangent

A straight line touching a curve once at a given point.

Diameter

A straight line passing through the centre of a circle to touc…

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…

Chord

Central angle

Inscribed angle

Arc

a line segment with both endpoints on the circle

An angle formed by two radii of a circle

An angle formed by two chords that share a common endpoint

A section of a circle

Chord

a line segment with both endpoints on the circle

Central angle

An angle formed by two radii of a circle

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

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

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

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

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

Chord

Tangent

Inscribed Angle

Central Angle

A line segment in the circle that intersects two sides of the…

A line that intersects the circle at one point.

An angle whose vertex is on the circle and is half the arc it…

An angle whose vertex is at the center of the circle and is eq…

Chord

A line segment in the circle that intersects two sides of the…

Tangent

A line that intersects the circle at one point.

1.) A tangent and a radius meet at 90 d…

2.) Two radii form an isosceles triangle

3.)The perpendicular bisector of a chor…

4.) The angle at the center of a circle…

A tangent is a line that just touches a single point on the ci…

Unlike other isosceles triangles they don't have the little ti…

A chord is any line drawn across a circle and no matter where…

The angle subtended at the center of a circle is exactly doubl…

1.) A tangent and a radius meet at 90 d…

A tangent is a line that just touches a single point on the ci…

2.) Two radii form an isosceles triangle

Unlike other isosceles triangles they don't have the little ti…

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°

Radius

Diameter

Chord

Secant

Distance from the center of a circle to a point on the circle.

A chord the goes through the center of a circle. (segment from…

Segment from one side of the circle to the other. Doesn't need…

A line going through a circle.

Radius

Distance from the center of a circle to a point on the circle.

Diameter

A chord the goes through the center of a circle. (segment from…

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…

Radius

Radii

Chord

Diameter

The distance from the center to the edge of a circle: It is ha…

A plural of radius

a straight line that joins two points on a curve

a line running through the center of a circle from one side to…

Radius

The distance from the center to the edge of a circle: It is ha…

Radii

A plural of radius

Chord

Secant

Tangent

Point of tangency

A segment whose endpoints lie on a circle.

A line that intersects a circle at 2 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 2 points

Tangent

Secant

Central Angle

Inscribed Angle

A line, segment or plane that touches the circle at exactly on…

A line or segment that touches the circle at two points, and e…

An angle with its vertex at the center of the circle

An angle with its vertex on the circle.

Tangent

A line, segment or plane that touches the circle at exactly on…

Secant

A line or segment that touches the circle at two points, and e…

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

Radius

Diameter

Diameter

It is the distance between the center and any point on a circl…

The distance from the center point to the circumference of a c…

The distance between two pints on a circle that passes through…

A chord passing through the center of a circle.

Radius

It is the distance between the center and any point on a circl…

Radius

The distance from the center point to the circumference of a c…