Understanding the Parts of a Circle

What is the radius of a circle?

• A segment that intersects the circle at two points

• A segment that touches the circle at one point

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

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

What defines a diameter of a circle?

• A segment from the center to the edge

• A line that touches the circle at one point

• A line from one edge to another passing through the center

• A line that intersects the circle at two points outside the center

What is a chord in a circle?

• A line that touches the circle at one point

• A line that passes through the center

• A line segment with both endpoints on the circle

• A line segment from the center to the edge of the circle

How does a secant differ from a chord?

• A secant is always horizontal

• A secant never intersects the circle

• A secant touches the circle at one point

• A secant is a line, not a segment

What is a tangent to a circle?

• A line intersecting the circle at two points

• A segment with endpoints on the circle

• A line from the center to the edge of the circle

• A line that touches the circle at exactly one point

What defines a minor arc?

• An arc that is more than half the circle

• An arc that is exactly half the circle

• An arc that is less than half the circle

• An arc that extends around the entire circle

What is a major arc?

• An arc less than 180 degrees

• An arc that is exactly 180 degrees

• An arc that is less than half the circle

• An arc that is more than half the circle

How do you name a minor arc?

• Using the two endpoints

• Using the center point of the circle

• Using three letters to indicate direction

• Using any point on the arc

When naming a major arc, why do you use three letters?

• To indicate the exact length of the arc

• To differentiate it from a minor arc

• To show it is more than half the circle

• To specify the direction of the arc

What is the purpose of the third point in naming a major arc?

• To determine the direction of the arc

• To show it is a complete circle

• To indicate the starting point

• To specify the arc's curvature