Answer:
192 mm
Step-by-step explanation:
The area of a triangle is 1/2 bh and the base is 8 and the height is 8. 8*8= 64 divided by two is 32. There are four of these sides, so 4* 32 is 128. Then you also have to account for the square bottom which has dimensions of a width of 8 and a height of 8 making the bottom 64. When you add 128 and 64 together you get 192.
Hope this helped
