A ray has a finite length.

Answer

**Step-by-Step Solution:**

1. **Understanding the Definition of a Ray:**
- A ray is defined as a part of a line that starts at a fixed point (called the endpoint) and extends infinitely in one direction.

2. **Identifying the Key Characteristics of a Ray:**
- A ray has one endpoint.
- It continues indefinitely in one direction without a defined length.

3. **Analyzing the Statement:**
- The statement claims that "a ray has a finite length."
- Finite length means that the length of the ray is limited or fixed, such as 10 cm or 15 cm.

4. **Determining the Truth of the Statement:**
- Since a ray can be extended indefinitely, it does not have a fixed length.
- Therefore, the statement that a ray has a finite length is incorrect.

5. **Conclusion:**
- The statement "a ray has a finite length" is **false**.

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