Answer:
2 nights
Step-by-step explanation:
If Bandy makes 2 centimeters a night, then just multiply that by 2, which would mean 2 nights.
Think of a circle. We know it (and all circles) measure 360°. If you think about bisecting that circle, you would divide its 360° by 2, which results in 180°. The circle becomes a half-circle after being bisected, and its straight side (a straight angle) is 180°.
I've attached a diagram illustrating this.