Answer:
96 square units
Step-by-step explanation:
Add the areas of all of the polygons in the area net which represent the sides of the triangular prism:
SA = 2 small rectangles + 1 big rectangle + 2 small triangles
SA = 2(3 * 7) + (6 * 7) + (6 * 2)
= 42 + 42 + 12
= 84 + 12
= 96 square units
