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# What are two rays with a common endpoint?

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Two rays that have a common endpoint form an angle. In this formed angle, the endpoint is known as the vertex while the rays are its sides.

## Keep Learning

There are different ways to name an angle. Students can use the three points like E, F, and G, where E and G are points on each ray and F is the vertex point. Three ways of naming this angle are: angle EFG, angle F, or angle GFE.

There are many different angles formed from two rays and a vertex point, such as a right, acute, obtuse, or straight angle. While an obtuse angle is greater than 90 degrees, an acute angle is less than 90 degrees. A straight angle is a line that has 180 degrees.

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## Related Questions

• A:

Two rays that meet at a common endpoint are called an angle in geometry. In an angle, the rays are its sides and the endpoint is the vertex.

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• A:

Two rays are opposite rays in geometry if they have a common initial point and form a straight line. Essentially, these rays point in opposite directions. The common initial point is also called the end point of a ray.

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In a Cartesian coordinate system, the y-axis sits at a 90-degree angle from the x-axis. The two axes meet at a point where the numerical value of each is equal to zero. On a map of the world, this is analogous to the point where the equator is crossed by the prime meridian.