Mathematics 10 — Exercise Review · Q1 (9)
Full question
Choose the sector area formula with θ in radians. (a) ½rθ (b) 3r²θ/2 (c) ½r²θ (d) 3rθ/2
Step-by-step solution
The sector is θ/(2π) of the circle; multiplying πr² gives ½r²θ.
Answer
(c) A=½r²θ.
Choose the sector area formula with θ in radians. (a) ½rθ (b) 3r²θ/2 (c) ½r²θ (d) 3rθ/2
The sector is θ/(2π) of the circle; multiplying πr² gives ½r²θ.
(c) A=½r²θ.