Circle Geometry Concepts and Definitions

This video tutorial by Mr. Allen covers essential circle vocabulary, including naming circles based on their center, understanding diameters and radii, and exploring chords, tangents, secants, and arcs. It also delves into angles within circles, such as inscribed and central angles, providing a comprehensive overview of circle-related terms and concepts.

What is the name of a circle based on?

• Its diameter

• Its circumference

• Its radius

• Its center

How is a diameter defined in a circle?

• A line that extends infinitely

• A line that touches the circle at one point

• A line that passes through the center connecting two points on the circle

• A line from the center to the edge

Which of the following is a radius?

• A line that passes through the center connecting two points on the circle

• A line from the center to any point on the circle

• A line that touches the circle at one point

• A line that extends infinitely

What is a chord in a circle?

• A line that touches the circle at one point

• A line that connects two points on the circle without passing through the center

• A line from the center to any point on the circle

• A line that passes through the center connecting two points on the circle

Which of the following is true about a tangent?

• It passes through the center of the circle

• It connects two points on the circle

• It touches the circle at exactly one point

• It is a line segment within the circle

What distinguishes a secant from a chord?

• A secant is shorter than a chord

• A secant touches the circle at one point, while a chord passes through the center

• A secant is a segment, while a chord is a line that extends infinitely

• A secant is a line that extends infinitely, while a chord is a segment

How is a major arc different from a minor arc?

• A major arc is less than 180°, while a minor arc is more than 180°

• A major arc is more than 180°, while a minor arc is less than 180°

• A major arc is a line, while a minor arc is a segment

• A major arc is inside the circle, while a minor arc is outside

What is an inscribed angle?

• An angle with its vertex on the circle

• An angle with its vertex at the center of the circle

• An angle that measures more than 180°

• An angle that measures less than 90°

What is a central angle?

• An angle with its vertex at the center of the circle

• An angle with its vertex on the circle

• An angle that measures more than 180°

• An angle that measures less than 90°