Answer:
2
Step-by-step explanation:
3 - 1 = 2
You only need one if you follow a pattern of
top left dot
top middle dot
middle middle dot
middle left dot
bottom left dot
bottom middle dot
bottom right dot
middle right dot
top right dot
No can’t u just search it up I feel like you’ll get the answer to this question in to time
The answer is 35 centimetres