Question

I'm so frustrated. :((

Answer 1

Let's go through them one at a time. If you look at I, it says to reflect the triangle across the line l.

The resulting triangle would look something like that, which does NOT look like triangle 2

Answer 2

Okay with that?

Answer 3

Okay.

Answer 4

Alright. So we know that I. is not correct. Now let's look at II.
If we rotate triangle 2 across line m, we get this:

That basically tells us how to get from triangle 2 to triangle 1. But we don't want triangle 1, we want triangle 2.

Answer 5

Wait, I was wrong on case I. It wanted us to reflect triangle 3 across line l.

That actually works. So I is correct, but II is not.