Answer:
120m²
Step-by-step explanation:
you need to find the area of each surface on the triangular prism. there are 5 faces so we need to find the area of all 5.
since there are two triangles you can take the area of the first triangle and multiply it by 2 in one equation
combined triangle areas:
A= 2 (1/2bh)
A=bh
A=3(4)
A=12m²
9 x 5 rectangle:
A=bh
A=9(5)
A=45m²
9 x 4 rectangle:
A=bh
A=9(4)
A=36m²
9 x 3 rectangle:
A=bh
A=9(3)
A=27m²
add all the areas together to get 27+36+45+12=120m²
