Question

Step by step explanation please

Answer 1

Two equal triangles

2(1/2×b×h)

=2(1/2×8×10)

$= 80 {cm}^{2}$

Three rectangles

=3(l×h)

=3(18×8)

=3(144)

$432 {cm}^{2}$

Total Surface area

$80 {cm}^{2} + 432 {cm}^{2} \\ 512 {cm}^{2}$