Question

and are parallel lines. which angles are adjacent angles? and and and and

Explanation:

Step1: Recall the definition of adjacent angles

Adjacent angles share a common vertex and a common side.

Step2: Analyze each option

• For $\angle GFH$ and $\angle BCF$: They do not share a common vertex.
• For $\angle BCA$ and $\angle BCF$: They share vertex $C$ and side $BC$.
• For $\angle BCA$ and $\angle GFH$: They do not share a common vertex or side.
• For $\angle EFC$ and $\angle BCF$: They do not share a common vertex.

Answer:

$\angle BCA$ and $\angle BCF$