Answer:
surface area =0.1357
Step-by-step explanation:
first, find the triangle area
to find use triangle area= base x height divided by 2
so .18 x .23
=0.0414
divided by 2
= .0207
multiplty 0.0414 by 4 because theres a total of 4 triangle sides
.0207 x 4 = 0.0828
now find the area of the square on the bottom
area= base x height
.23 x .23 = 0.0529
now add the two areas together
0.0529 + 0.0828= 0.1357
