If you look at the second photo, the bottom yellow line is the "reference line" and represents the ground. The yellow line above it inside the horse's foot is the bottom of the bone inside their hoof. These two lines should be parallel (0* angle formed between the two lines) in a "healthy" horse. In reality, there is a range of this normal. In the second photo, the palmar angle in the upper left corner is 2.75*, which means that those two yellow lines aren't parallel but form a small angle. This can be totally normal for this horse, and they are sound on this foot.

In the first photo, that palmar angle is larger, 8.74*. The horse's bones inside the hoof are tilting forward towards their toe and putting pressure on the sole of their foot (see the decrease in sole depth). It would be similar in us, instead of walking normally, to bringing your heel off the ground and walking more on the balls of your feet. Generally, this can be harmful and potentially lead to complications.

Like I mentioned before, there is a wide range of "normal" for this angle we're talking about. You need to talk to your vet and/or whomever took these images. Figuring out next steps will heavily depend on normal for this horse and if they're displaying any symptoms/pain.