Understanding angle relationships is really important for solving problems in Year 8 math! Here are some key ideas you should know:

1. Complementary Angles: These are two angles that add up to $90^\circ$. For example, if one angle measures $30^\circ$, then the other angle needs to be $60^\circ$.

2. Supplementary Angles: These angles add up to $180^\circ$. So, if you have an angle that is $110^\circ$, the angle that goes with it would be $70^\circ$.

3. Vertical Angles: When two lines cross, they create equal angles across from each other. For instance, if one angle is $45^\circ$, the angle directly opposite it will also be $45^\circ$.

By using these angle relationships, you can solve different geometry problems. This includes figuring out unknown angles in shapes or finding angles in real life situations, like in building design!