Question: Which angles are supplementary angles?
F───G───H
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/
/
I───J───K
/
/
L
The slanted line passes through L, J, G, and E; the top horizontal line passes through F, G, and H; the bottom horizontal line passes through I, J, and K. position_hint: center
\angle IJL and \angle HGE
\angle IJL and \angle FGJ
\angle IJL and \angle KJG
\angle IJL and \angle IJG
1. **Problem Statement:** Identify which pairs of angles are supplementary angles.
2. **Definition:** Supplementary angles are two angles whose measures add up to $$180^\circ$$.
3. **Given Angles:**
- $$\angle IJL$$ is formed at point $$J$$ between points $$I$$ and $$L$$.
- $$\angle HGE$$ is formed at point $$G$$ between points $$H$$ and $$E$$.
- $$\angle FGJ$$ is formed at point $$G$$ between points $$F$$ and $$J$$.
- $$\angle KJG$$ is formed at point $$J$$ between points $$K$$ and $$G$$.
- $$\angle IJG$$ is formed at point $$J$$ between points $$I$$ and $$G$$.
4. **Analyze pairs:**
- $$\angle IJL$$ and $$\angle HGE$$: These angles are at different points ($$J$$ and $$G$$) and not adjacent or forming a straight line, so unlikely supplementary.
- $$\angle IJL$$ and $$\angle FGJ$$: $$\angle IJL$$ is at $$J$$, $$\angle FGJ$$ is at $$G$$; these points are connected by the slanted line but angles are not adjacent or forming a straight line.
- $$\angle IJL$$ and $$\angle KJG$$: Both angles share vertex $$J$$.
- $$\angle IJL$$ is between $$I$$ and $$L$$.
- $$\angle KJG$$ is between $$K$$ and $$G$$.
- Since $$I-J-K$$ is a straight horizontal line and $$L-J-G$$ is the slanted line, $$\angle IJL$$ and $$\angle KJG$$ are adjacent angles on a straight line.
- Therefore, $$\angle IJL + \angle KJG = 180^\circ$$, so they are supplementary.
- $$\angle IJL$$ and $$\angle IJG$$: Both share vertex $$J$$ and points $$I$$ and $$J$$, but $$\angle IJG$$ is between $$I$$ and $$G$$, which is part of the slanted line.
- These two angles overlap and do not form a linear pair.
5. **Conclusion:** The supplementary angles are $$\angle IJL$$ and $$\angle KJG$$.
**Final answer:** $$\boxed{\angle IJL \text{ and } \angle KJG \text{ are supplementary angles}}$$.