The bottom triangle ABC is an equilateral triangle, so the distance from the center of gravity to each vertex: the distance from the center of gravity to each side =2: 1.
S (regular pyramid) = 3×1/2× 8×10+(1/2× 8× 4tan30) × 3.
= 120+ 16√3
What is the professional code name of "One" teacher?
Code of each major:
Agronomy:
Agronomy: 090 10 1 horticulture: 090 102 plant protection: 090 103