A sector of circle (r = 20cm) has central angle 60°. Another sector same circle has angle π/3 radians. Ratio of areas?

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1. **Formula:** The area of a sector is $A=	frac12 r^2	heta$ with $	heta$ in radians.
2. **Convert:** $60^\circ = \pi/3$ radians.
3. **Compare:** Both sectors have the same radius $r=20$ cm and the same angle $	heta=\pi/3$, so their areas are equal.
4. **Ratio:** Equal areas give ratio $1:1$.

FINAL_ANSWER: a

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