Find the area of a sector of a circle with radius 12 cm and central angle π/5 radians.

Question

Accepted Answer

1. Use the sector area formula: $A=	frac{1}{2}r^2	heta$.  
2. Put $r=12$ and $	heta=\pi/5$: $A=	frac{1}{2}\cdot12^2\cdot\dfrac{\pi}{5}=\dfrac{72\pi}{5}$.  
3. Calculate the number: $\dfrac{72\pi}{5}\approx\dfrac{72	imes3.14159}{5}\approx45.24	ext{ cm}^2$.  
4. So the correct choice is **(b)**.  
FINAL_ANSWER: <b>

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