Hey there! I'm happy to help!
AREA
To find the area of a parallelogram, you multiply the base by the height.
12(6)=72
The area is 72 square centimeters.
PERIMETER
The two diagonal sides are 8 cm and the two bases are 12 cm.
8+8+12+12=40
The perimeter is 40 cm.
Have a wonderful day! :D