# Roll Out!

### Talkin' about Curvaceous Circles

## Every Curvaceous Circle has special lines.

## Some of our top rollers:

## Cantankerous ChordCantankerous Chords are inside Curvaceous Circles. [A segment whose endpoints lie on a circle.] | ## Dinky DiameterDinky Diameters are special Cantankerous Chords. [A chord that contains the center of a circle.] | ## Sassy Secant of a CircleSassy Secants contain Cantankerous Chords. [A line that contains a chord.] |

## Cantankerous Chord

Cantankerous Chords are inside Curvaceous Circles. [A segment whose endpoints lie on a circle.]

## Dinky Diameter

Dinky Diameters are special Cantankerous Chords. [A chord that contains the center of a circle.]

## Tacky Tangent to a CircleTacky Tangents only touch Cantankerous Circles. [A line that lies in the plane of a circle and that intersects the circle at exactly one point (point of tangency).] | ## Radiant RadiusRadiant Radii are half of a Dinky Diameter. [A segment from a point on a circle or a sphere to the center.] | ## Calculating CircumferenceCalculating Circumferences are special. They measure the distance around the Cantankerous Circles using the Radiant Radius or Dinky Diameter! {2*pi*r or d*pi} [Distance around a circle, that is, the perimeter of a circle.] |

## Tacky Tangent to a Circle

Tacky Tangents only touch Cantankerous Circles. [A line that lies in the plane of a circle and that intersects the circle at exactly one point (point of tangency).]

## Radiant Radius

Radiant Radii are half of a Dinky Diameter. [A segment from a point on a circle or a sphere to the center.]

## Infamous Inscribed AngleInfamous Inscribed Angles take a chunk out of the Curvaceous Circles using two Cantankerous Chords. [Angle whose vertex lies on a circle and whose sides contain chords of the circle.] | ## Chipper Central AngleChipper Central Angles take a different chunk out of the Curvaceous Circles using two Radiant Radii. [Angle whose vertex is the center of a circle and whose sides contain radii of the circle.] |

## Infamous Inscribed Angle

Infamous Inscribed Angles take a chunk out of the Curvaceous Circles using two Cantankerous Chords. [Angle whose vertex lies on a circle and whose sides contain chords of the circle.]