Important points:
| Type |
End points |
| Line segment |
2 |
| Ray |
1 |
| Line |
0 |
1. When to lines meet, they intersect & point where they meet is point of intersection.
2. Parallel lines are lines that never intersect.
3. When lines or segment meet, they form angles.
4. Complementary angles are those angles whose sum of measure is 90°.
5. Supplementary angles are those angles whose sum of measure is 180°.
6. Linear pair of angles are adjacent angles who are supplementary.
7. Transversal is a line that intersects two or more lines at distinct points.
8. If two lines are parallel:
- Corresponding angles are equal.
- Alternate interior angles are equal.
- Interior angles on the same side of the transversal are supplementary.
