Answer:
The radius is 4 because since the diameter is 8, the radius is half of the diameter.
Answer:
choice C. Perfect square trinomial is correct.
Step-by-step explanation:
We need to find the pattern which is represented by the polynomial
.
To find that pattern, we need to factor 





which is a perfect square.
Hence choice C. Perfect square trinomial is correct.
The first choice is the contains only irrational number