A. 10
B. 28
C. 56
D. 55
🧠 Explanation (Math):
Given: Shape with 8 vertices; triangles from all vertex triplets
Step 1: Count triangles $=^{8}C_3=frac{8cdot7cdot6}{6}=56$.
Step 2: Matches given value.
Final Answer: 56A. 10
B. 28
C. 56
D. 55
Given: Shape with 8 vertices; triangles from all vertex triplets
Step 1: Count triangles $=^{8}C_3=frac{8cdot7cdot6}{6}=56$.
Step 2: Matches given value.
Final Answer: 56