To determine which represents two rays that intersect at a common endpoint, let's first define what each term means:
1. Line Segment: A line segment is part of a line that is bounded by two distinct end points and contains every point on the line between its endpoints.
2. Angle: An angle is formed when two rays intersect at a common endpoint. This common endpoint is known as the vertex of the angle, and the two rays are called the sides of the angle.
3. Perpendicular Lines: Perpendicular lines are two lines that intersect at a right angle (90 degrees), not rays intersecting at a common endpoint.
4. Plane: A plane is a flat, two-dimensional surface that extends infinitely in all directions.
Given these definitions, it becomes clear that “an angle” is the correct answer because it is defined by two rays that intersect at a common endpoint. This point where the rays meet is called the vertex, and the rays themselves form the sides of the angle.
Thus, the answer is:
O an angle
