Author note — to cover (Higher)

Higher only — G22 names the sine rule among formulas to know and apply. Find a side from a matched angle-opposite pair plus one more angle, finding third angles via 180 first when needed. Choosing between the rules has its own page; the obtuse ambiguity sits on the angles page. (G22)

• Fluency — direct questions on the sine rule for sides, 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).