Author note — to cover

One third of base area times perpendicular height for pyramids on any polygonal base, distinguishing perpendicular height from slant edge. G17 requires calculating with this formula and does not list it among those to know by heart. Cones are the circular sibling; frustums are Higher. Both tiers. (G17)

• Fluency — direct questions on volume of a pyramid, limited to this lesson's stated scope (4 questions).
• Application — use the same skill in unfamiliar or contextual questions without introducing a later method (4 questions).
• Check — questions built around the exclusions and likely misconceptions named in the lesson brief (4 questions).