By joining any two points on a circle, we obtain its

Options

A. radius
B. diameter
C. chord
D. circumference

Answer

To solve the question "By joining any two points on a circle, we obtain its...", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Circle**:
- A circle is defined as the set of all points that are equidistant from a fixed point known as the center.

2. **Identifying Points on the Circle**:
- Let's consider two points on the circumference of the circle. We can label these points as A and B.

3. **Joining Two Points**:
- When we join these two points A and B with a straight line, we create a line segment.

4. **Defining the Line Segment**:
- This line segment that connects points A and B is called a **chord** of the circle.

5. **Understanding Other Terms**:
- If we join the center of the circle (let's say point O) to point A or point B, that line segment is called the **radius** of the circle.
- If we join the center O to both points A and B and the line segment passes through the center, it becomes the **diameter** of the circle, which is the longest chord.
- The term **circumference** refers to the total distance around the circle, not a line segment between two points.

6. **Conclusion**:
- Therefore, by joining any two points on a circle, we obtain a **chord**.

### Final Answer:
By joining any two points on a circle, we obtain its **chord**.