Author note — to cover (Higher)

Higher only (G10): a tangent meets the radius at 90 degrees at the point of contact, and the two tangents from an external point are equal, giving isosceles triangles and kite figures; combine with Pythagoras for lengths. The alternate segment theorem gets its own page. (G10)

• Fluency — direct questions on tangents to a circle, 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).