Answer:
Exact form: 121π
Decimal form: 380.1327111...
Explanation:
The area of the circle is given by the formula A = πr², where A is the area of the circle and r is the radius.
Given the diameter of 22cm, we know that the radius is 11cm, as the radius is half the diameter.
We can then put this into the formula to find the area of the circle:
A = πr²
A = π * 11²
A = 121π
Note that the answer here is given in terms of π so it can be expressed in its exact form, as 121π is an irrational number roughly equivalent to 380.1327111... The answer you need to provide will depend on whether the question asks for the exact form, or to a certain number of decimal places / significant figures. If it the latter, you can round off the decimal answer as appropriate.