Which term is defined as a figure formed by two rays with a common endpoint?

Which term is defined as a figure formed by two rays with a common endpoint?

• A. Angle
• B. Polygon
• C. Triangle
• D. Rectangle

Answer: (A)

Two rays that share a single endpoint form an angle. The shared endpoint is called the vertex, and the space between the two rays is the angle itself. Angles describe how much you turn from one ray to the other and are named by the vertex (or by three letters with the vertex in the middle). This differs from polygons, which are closed figures made of straight sides: a triangle has three sides, and a rectangle has four sides with four right angles. So the term defined by two rays with a common endpoint is an angle.

Two rays that share a single endpoint form an angle. The shared endpoint is called the vertex, and the space between the two rays is the angle itself. Angles describe how much you turn from one ray to the other and are named by the vertex (or by three letters with the vertex in the middle). This differs from polygons, which are closed figures made of straight sides: a triangle has three sides, and a rectangle has four sides with four right angles. So the term defined by two rays with a common endpoint is an angle.