Exploring Circle Vocabulary

What is the definition of a circle in contrast to polygons?

• A figure with only curved lines

• A shape with equal sides and angles

• A closed figure with no straight lines

• A polygon with infinite sides

What is the term for the line from any point on the circle to the center?

• Diameter

• Chord

• Circumference

• Radius

If the radius of a circle is 3 cm, what is the diameter?

• 3 cm

• 9 cm

• 6 cm

• 1.5 cm

What is a chord in the context of a circle?

• The longest possible segment within the circle

• Any segment that touches two points on the circle's boundary

• A segment connecting the center to any point on the circle

• A segment that divides the circle into two equal parts

What do we call the distance around a circle?

• Diameter

• Area

• Radius

• Circumference

How is the measure of a central angle related to its intercepted arc?

• It is half the measure of the arc

• It is twice the measure of the arc

• It is equal to the measure of the arc

• It has no relation to the arc

If a central angle measures 120 degrees, what is the measure of the arc it intercepts?

• 120 degrees

• 180 degrees

• 240 degrees

• 60 degrees

What is the measure of an intercepted angle if the arc it intercepts measures 80 degrees?

• 40 degrees

• 120 degrees

• 160 degrees

• 80 degrees

What is a tangent line in relation to a circle?

• A line that forms a right angle with the radius

• A line that passes through the center of the circle

• A line that touches the circle at exactly one point

• A line that intersects the circle at two points

What is the relationship between a secant line and the circle it intersects?

• It is parallel to the diameter

• It cuts the circle at two points

• It touches the circle at one point

• It is the same as a tangent