IB Maths AI SL 3.4 Arc length & sector area
IB Maths AI SL 3.4 Arc length & sector area
Students practise calculating arc lengths and sector areas using θ in radians, often within compound shapes involving circles, triangles, and shaded regions.
How this is tested
- apply s = rθ or A = ½r²θ with θ converted from degrees or found via right-triangle trig in diagrams
- find shaded area by subtracting the triangle area from the sector area
- combine arc length with straight-line segments using fraction-of-circle reasoning