To identify and calculate the perimeter:
a)
Since, it has 3 sides.
Therefore, it is a triangle.
Perimeter is,
[tex]\begin{gathered} P=a+b+c \\ =12+15+8 \\ =35 \end{gathered}[/tex]
Hence, perimeter of the triange is 35 ft.
b)
It is a trapezium.
Perimeter of trapezium is,
[tex]\begin{gathered} P=a+b+c+d \\ =6+3+6+5 \\ =20 \end{gathered}[/tex]
Hence, perimeter of the trapezium is 20 ft.
c)
It is a rhombus.
Perimeter of rhombus is,
[tex]\begin{gathered} P=4s \\ =4(14) \\ =56 \end{gathered}[/tex]
Hence, perimeter of the rhombus is 56 ft.
d)
It is a regular hexagon.
Perimeter of regular hexagon is,
[tex]\begin{gathered} P=6s \\ =6(8) \\ =48 \end{gathered}[/tex]
Hence, perimeter of the regular hexagon is 48 ft.