It says all sides and angles are equal so each square is worth 1 so
B ) each side is 3 since you can see the top side takes up 3 squares so to find the perimeter you add 3 6 times or 6×3=18 perimeter is 18
C) draw a line horizonaly threw the points that form an angle (1.5,2.5) and (7.5,2.5) this will give you a 4 sided polygon (trapizoid) it said one base is double the other so if one base (the top side) is 3 the bottom base the line you drew would be 6
Since you know all the outside sides are 3 you add 3 +3+3+6 to figure out the perimeter of the polygon the perimeter of the polygon is 15