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Sagot :
Answer:
[tex] \boxed{\bf A)\: 3 \: units}[/tex]
Step-by-step explanation:
Given that, the area = 9π units²
Area of a circle = πr²
So...
- [tex]\bf {\pi}r^{2} = 9\pi[/tex]
- [tex]\bf {r}^{2} = 9[/tex]
- [tex]\bf r = 3 \: units[/tex]
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