Final answer:
The area of a circle is given, and we need to find the diameter.
Step-by-step explanation:
The formula to find the area of a circle is A = πr², where A is the area and r is the radius. In this case, we need to find the radius first. A = 198 cm², so we can solve for r: 198 = πr². To find the diameter, we multiply the radius by 2: diameter = 2r. To solve for the diameter, we need to find the value of r. Divide both sides of the equation by π and then take the square root of both sides: r = √(198/π). Plug in this value of r into the formula for diameter to find the answer.
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