Answer:
y=4
Step-by-step explanation:
#1 is a pentagon.
It's regular, because all the sides are the same length.
#2 is a hexagon.
It's not regular, because the sides don't all have the same length.
I would say the first one 3.30 and for 2.the 4th chart
6 decimeters is equal to 600 millimeters