Angles Around Parallel Lines - Go Teach Maths: Handcrafted ... - Free Printable

Let me carefully examine the image to identify the specific problem and solve it.

The image shows a grid of geometry problems involving angles around parallel lines with triangles. Each diagram has one or more missing angles labeled with letters (a°, b°, c°, etc.) that need to be found.

Since the user hasn't specified which particular angle to solve for, I need to determine which problem is the main task. Looking at the layout, the first diagram in the top-left corner appears to be the primary example, as it's the first one and has angle "a°" marked.

Let me zoom in on the first diagram to analyze it clearly.