No student devices needed. Know more
15 questions
The set of all points in a plane that are equidistant from a given point.
Circle
Semicircle
Half Circle
Point
The point in the middle. The point is used to name the circle.
Center of a Circle
Point
Middle Dot
Segment
The distance from the center of a circle to a point on the circle. Endpoints are the center and a point on the circle.
Radius
Circumference
Diameter
Segment Length
Distance across a circle, through the center of the circle.
Diameter
Radius
Chord
Segment
A segment whose endpoints are points on the circle.
Chord
Tangent
Secant
Angle
A segment that crosses the outside of the circle at two or more points and continues past the circle.
Secant
Tangent
Chord
Segment
A segment that touches a circle at exactly one point.
Tangent
Segment
Secant
Chord
The distance around the circle (perimeter)
Circumference
Area
Circle
Length
A segment of the circumference of a circle.
Arc
Tangent
Major Arc
Tangent
An arc whose endpoints of the circles diameter (half the circle).
Semicircle
Moon
Arc
Circumference
An arc that measures less than 180 degrees
Minor Arc
Major Arc
Arc
Angle
An arc that measures between 180 and 360 degrees.
Major Arc
Minor Arc
Arc
Semicircle
An angle whose vertex is the at the center of a circle.
Central Angle
Inscribed Angle
Obtuse Angle
Acute Angle
An angle whose vertex lies of the circle and both endpoints lie across the circle.
Inscribed Angle
Central Angle
Angle
Arc
The portion inside of the circle
Area
Circumference
Angle
Arc
Explore all questions with a free account