Discussion
If 
denotes the area of a circle with diameter d, then which of the following is equal to 
?
*This question is included in Nova Press: Set D - Defined functions, question #4
denotes the area of a circle with diameter d, then which of the following is equal to ?
| (A) |  |
| (B) | ... |
| (C) | ... |
| (D) | ... |
| (E) | ... |
| (F) | ... |
The solution is
Posted: 01/12/2014 03:08
Why radious is equal to d/2?
Posted: 01/13/2014 17:15
Nora, the radius of a circle is half of its diameter.
Posted: 01/31/2014 08:31
Hello I've reached at the result 36pi square , but I don't understand why the answer is 12pi
Posted: 01/31/2014 10:38
Natalia, you arrived at the correct answer. However, you misread answer D. Answer D is not 12π, but π times the area of a circle with d=12.
Posted: 02/05/2014 08:07
How did you get 12
Posted: 02/05/2014 14:23
Eve, as mentioned, answer D is not 12. But it is π x "the area of a circle with diameter = 12"