Circle Vocabulary

Front

What is a Minor Arc?

Back

A Minor Arc is the smaller arc connecting two points on a circle, measuring less than 180 degrees.

Front

What is a Major Arc?

Back

A Major Arc is the larger arc connecting two points on a circle, measuring more than 180 degrees.

Front

What is a Semi-Circle?

Back

A Semi-Circle is an arc that measures exactly 180 degrees, dividing the circle into two equal halves.

Front

What is a Central Angle?

Back

A Central Angle is an angle whose vertex is at the center of the circle and whose sides intersect the circle.

Front

What is a Radius?

Back

A Radius is a line segment from the center of the circle to any point on the circle.

Front

What is a Diameter?

Back

A Diameter is a line segment that passes through the center of the circle and connects two points on the circle, measuring twice the length of the radius.

Front

What is a Chord?

Back

A Chord is a line segment whose endpoints lie on the circle.

Front

What is a Secant?

Back

A Secant is a line that intersects the circle at two points.

Front

What is a Tangent?

Back

A Tangent is a line that touches the circle at exactly one point.

Front

What is the relationship between a Radius and a Diameter?

Back

The Diameter is twice the length of the Radius.