Practice problem
What is the area of a circle with circumference 9π\frac{9}{\pi}π9?
9π2\frac{9}{\pi^2}π29
818181
814π\frac{81}{4\pi}4π81
814π2\frac{81}{4\pi^2}4π281
Type a concept, like “slope” or “photosynthesis”.
