Answer:
A = C2 / (4 π).
Step-by-step explanation:
1. The area of a circle is given by the formula A = π r2, where A is the area and r is the radius. The circumference of a circle is C = 2 π r.
2. If we "solve for r" in the second equation, we have r = C / (2 π ). Now we use this to replace r in the first equation: A = π [ C / (2 π ) ]2.
3. When we simplify this, we get A = C2 / (4 π).
