B I think I’m not sure because you did not include the type of prism... rectangular triangular? Also if your talking about lateral surface area! so 400mm squared b I think
Answer:
73
Step-by-step explanation:
2x+x+53+88=360
Add up the numbers together.
3x+141=360
Subtract 141 from 360
3x=219
Divide 219 by 3
x=73