geo quiz

center

A point that's equidistant (the same distance) from any point on a given circle.

Radius

A line segment that runs from a circle's center to a point on the given circle.

Diameter

A chord that runs through a circle's center.

Chord

A segment that connects any two points on a given circle.

Central angle

An angle whose vertex is a given circle's center and whose legs or sides intersect the circle.

Inscribed angle

An angle whose vertex lies on a given circle and whose legs or sides intersect the circle at two other points.

Secant

A line, ray, or segment that extends beyond the given circle and intersects it at more than one point.

Tangent

A line, ray, or segment that intersects a given circle at only one point (even if extended).

Point Of Tangency

The point that intersects the circle

Minor arc

Central angle less then 180

Major Arc

Central angle more than 180

Semi Circle

Central angle equal to 180

Inscribed Angle

An angle with it’s vertexs on the circle with two sides that are chords

Area Formula

A=πr²

Circumference formula with radius

C=2πr

Circumference formula with diameter

C=πd

arc length formula

l=x times c divided by 360

area of sector formula

x times r divided by 360

inscribed angle rule

the angle is half the measure of the arc

inscribed angle diameter rule

if an inscribed angle intercepts a diameter its a right triangle

inscribed angle overlapping rule

if two inscribed angle intersect the same arc the angles are congruent

inscribed quadilateral rule

opposite angles are supplementary (equal to 180)

tangent line segment rule

if two segments from the same external point are tangent to a circle then they are congruent

tangent polygon rule

if a polygon is circumscribed around a circle then all the sides are tangent