It’s 12345678910 because the mathematical people said so.
Try out this website or search "surface area of a triangular prism" in Google
http://www.ck12.org/geometry/Surface-Area-of-Triangular-Prisms/lesson/Surface-Area-of-Triangular-Pri...
7.91 = 8 21.9 = 22
8 + 22 = 30
Answer:
The answer is d
Step-by-step explanation:
Because all angles in parallelogram are the same