Geometry

Question Analysis:
This question involves calculating the area of a triangle base, then using the pyramid volume formula.

Key Concept Explanation:
First, area of the triangle base = (1/2) × base × height.
Then, volume = (1/3) × base area × pyramid height.

Step-by-Step Solution:
Triangle base area = (1/2) × 10 × 12 = 60 cm²
Volume = (1/3) × 60 × 9 = 540 ÷ 3 = 180 cm³

Common Mistakes:
Using the trian...