A quadrilateral has ......... vertices, no three of which are ....... .

Answer

To solve the question, we need to fill in the blanks in the statement about a quadrilateral.

### Step-by-Step Solution:

1. **Identify the number of vertices in a quadrilateral**:
A quadrilateral is defined as a polygon with four sides. Therefore, it has **4 vertices**.

2. **Understand the condition about collinearity**:
The statement mentions "no three of which are...". In geometry, collinear points are points that lie on the same straight line. For a quadrilateral to be formed, it is essential that not all three points are collinear; otherwise, they would not form a closed shape.

3. **Fill in the blanks**:
Based on the above understanding, we can fill in the blanks:
- A quadrilateral has **4 vertices**, no three of which are **collinear**.

### Final Statement:
A quadrilateral has **4 vertices**, no three of which are **collinear**.

---