Geometry

Question Analysis

This question focuses on identifying parts of a circle, specifically testing the understanding of concepts related to circle arcs and angles.

Key Concept Explanation

Radius: A line segment from the center of a circle to any point on its circumference.

Central Angle: An angle whose vertex is the center of the circle, and whose sides are radii.

Minor Arc: A part of the circumference that is less than a semi - circle.

Major Arc: A part of the circumference that is greater than a semi - circle.

Step-by-Step Solution

1. Observe the figure: The part in question is an angle with its vertex at the center of the circle, and its sides are radii of the circle.

2. Based on the definitions, this matches the definition of a central angle.

Option Analysis

A.Radius: A radius is a line segment, not an angle, so this option is incorrect.

B.Central Angle: As the angle has its vertex at the center of the circle and its sides are radii, this is the correct option.

C.Minor Arc: An arc is a part of the circumference, not an angle, so this option is incorrect.

D.Major Arc: Similar to the minor arc, a major arc is a part of the circumference, not an angle, so this option i...