Someone help me on the first one

Step-by-step explanation:

If you compare both figures, you would see that Example 1 shows an actual bisector, while Example 2 doesn't. Basically, you can deduct this by observing the simmetry around the bisector.

Remember that a bisector is a line which divide an angle in two equal parts, and the Example 2 doesn't show that. That's why Example 2 wasn't created by following the constitution steps correctly.

Therefore, Example 1 was created by following the constitution step correctly.