Circle Vocab & Properties

Front

What is the area enclosed by two radii and the corresponding arc in a circle called?

Back

Sector

Front

What is the term for a line that touches a circle at exactly one point?

Back

Tangent

Front

What is the longest chord in a circle called?

Back

Diameter

Front

What is the distance from the center of a circle to any point on its circumference?

Back

Radius

Front

What do you call a line segment whose endpoints lie on the circle?

Back

Chord

Front

What is the term for a part of a circle defined by two endpoints on the circle?

Back

Arc

Front

What is the angle formed by two chords that share an endpoint inside the circle?

Back

Inscribed Angle

Front

What is the angle formed outside the circle by two secants or two tangents?

Back

Exterior Angle

Front

What is the term for a line that intersects a circle at two points?

Back

Secant

Front

What is the relationship between the radius and diameter of a circle?

Back

Diameter = 2 x Radius