Surface area of composite 3-D figures practice seventh grade answers

To find the total surface area of the figure, we first need to determine the surface area of each individual face and then add them all together.

Face 1 (10 mm x 6 mm) = 60 mm²
Face 2 (6 mm x 6 mm) = 36 mm²
Face 3 (6 mm x 6 mm) = 36 mm²
Face 4 (8 mm x 6 mm) = 48 mm²
Face 5 (10 mm x 6 mm) = 60 mm²

Now, add the surface area of all the faces together:
60 mm² + 36 mm² + 36 mm² + 48 mm² + 60 mm² = 240 mm²

Therefore, the total surface area of the figure is 240 mm².