Dinner conversation changed to the topic of the sum of the angles inside a polygon. Dad was trying to remember the formula ((n-2)x180), and then explain it to Puff.
We were talking about hexagons, and then octagons, and Dad told Puff the formula.
“N-2”. So for an octagon, which has eight sides, N is 8. What is n-2?
“A hexagon!”
Wow!