Exploring Circles and Arc Measurements

What defines a circle?

• A set of all points equidistant from a given point called the center.

• A shape with a fixed center and variable distance from the center.

• A two-dimensional shape with equal length and width.

• A collection of points that form a square around a center.

What distinguishes a diameter from a chord?

• A chord does not necessarily pass through the center, but a diameter does.

• A diameter can be any segment inside the circle.

• A chord is always longer than a diameter.

• A diameter is any straight line segment that passes through the center of the circle.

How is the radius of a circle defined?

• The longest possible distance within the circle.

• Twice the length of the diameter.

• The distance from the center to any point on the circle.

• A segment that connects two points on the circle.

What makes circles congruent?

• Having the same diameter.

• Having the same center.

• Having congruent radii.

• Being in the same plane.

What is a semicircle?

• A minor arc that spans less than 180 degrees.

• An arc that is exactly half of a circle.

• A circle with a radius half the size of the original.

• A circle that has been cut into four equal parts.

How do you differentiate between a minor and a major arc?

• Minor arcs are always less than 90 degrees.

• Major arcs can only be exactly 180 degrees.

• A minor arc is longer than a major arc.

• A major arc adds a third point in its description to indicate the longer path.

What is the relationship between arc measure and central angle?

• They are always equal in degrees.

• There is no relationship between the two.

• The arc measure is twice the central angle.

• The central angle is half of the arc measure.

How is the circumference of a circle related to its diameter?

• Circumference is half the diameter multiplied by pi.

• Circumference equals diameter divided by pi.

• Circumference is the diameter multiplied by pi.

• There is no direct relationship.

What does arc length represent?

• The length of the radius.

• The degree measure of the arc.

• A fraction of the circle's circumference.

• The total distance around the circle.

How can you calculate the arc length?

• By multiplying the radius by the central angle.

• By dividing the circumference by the central angle.

• By using the central angle to find a fraction of the circumference.

• Arc length cannot be calculated.