Answer:
The surface area of the prism is 136m²
Hope this helps!
Explanation:
To find the surface area, you need to find the area of the three squares and the two triangles.
The two triangles are the same, so
× 6m × 4m = 12m.
One triangle has an area of 12m so the two triangles have an added area of 24m.
The base square has an area of 42m ( 6m × 7m ).
The slanted squares ( the squares on top ) are also the same so 5m × 7m = 35m, 35m + 35m = 70m
Add all the values together : 24m + 42m + 70m = 136m²