Circle Vocabulary Flashcards
Area of a sector
Area between two radii and the arc of a circle
Radius
Segment from the center to the edge of a circle
Minor arc
Arc measuring less than 180 degrees
Sector
Fraction of a circle’s area
Semicircle
half of a circle
Arc length
A fraction of a circle’s circumference
Arc
Smooth curve joining two points on a circle
Central angle
an angle formed by two radii with its vertex on the center of the circle
Inscribed angle
An angle formed by two chords with its vertex on the circle
Secant
a ray, line, or segment that intersects a circle at two points
Diameter
A chord that goes through the center of the circle
Major arc
An arc witha measure over 180 degrees
Circumference
The distance around a circle
Chord
A line segment that connects two points on a circle
Circle
The set of all points equidistant from a fixed point (the center)
