Fill in the blanks and select the correct option.
• The join of two adjacent vertices is called an __P__.
• A __Q__ is one that does not cross itself.
• Two or more distinct lines meeting at a point are called __R__ lines.
| P | Q | R | |
|---|---|---|---|
| A | Diagonal | Simple curve |
Concurrent |
| B | Edge | Curve | Parallel |
| C | Diagonal | Curve | Parallel |
| D | Edge | Simple curve |
Concurrent |