Question

Surface area (picture) help me pls

Answer 1

108 units²

Explanation:

The surface area is the sum of the areas of all the faces

There are 3 rectangular faces ( base, back and sloping face )

There are 2 congruent triangular faces ( sides )

area of base = 8 × 4 = 32 units²

area of sloping face = 8 × 5 = 40 units²

area of back = 8 × 3 = 24 units²

area of triangles = 2 ×
`(1)/(2)` × 4 × 3 = 4 × 3 = 12 units²

Thus

surface area = 32 + 40 + 24 + 12 = 108 units²