Circle Geometry Concepts

The video tutorial covers essential vocabulary and concepts related to circles, including the definitions and properties of segments like diameter, radius, chord, secant, and tangent. It explains the congruence of tangent lines and introduces the concepts of circle arcs, distinguishing between major and minor arcs using central angles.

What is a circle defined as?

• A collection of lines

• A collection of points equidistant from a central point

• A collection of angles

• A collection of shapes

Which segment is the longest in a circle?

• Chord

• Diameter

• Radius

• Secant

How is the radius related to the diameter?

• It is unrelated to the diameter

• It is equal to the diameter

• It is twice the diameter

• It is half the diameter

What is a chord?

• A line that touches the circle at one point

• A segment that goes through the center of the circle

• A line that cuts through the circle

• A segment connecting any two points on a circle

What is a secant?

• A line that touches the circle at one point

• A line that cuts through the circle and intersects it at two points

• A segment that goes through the center of the circle

• A segment connecting any two points on a circle

What is a tangent?

• A line that cuts through the circle

• A segment connecting any two points on a circle

• A segment that goes through the center of the circle

• A line that touches the circle at one point

What angle is formed between a tangent and a radius at the point of tangency?

• Right angle

• Obtuse angle

• Acute angle

• Straight angle

When are two tangent segments congruent?

• When they are equal in length

• When they are perpendicular

• When they emanate from the same external point

• When they are parallel

What is the perimeter of a circle called?

• Circumference

• Chord

• Radius

• Diameter

What is a major arc?

• An arc that is more than 180 degrees

• An arc that is exactly 180 degrees

• An arc that is equal to the radius

• An arc that is less than 180 degrees