Answer:
12=obtuse
13=right
14=not a triangle
16=acute
Step-by-step explanation:
The answer is B. f(x) = (x − 1)(x − 2)(x + 1)(x + 2)
We use Tan in this case:
Tan=(opposite/adjacent)
Tan(36)=23/x
x=23/Tan(36)
x=31.64 length
Hope it helps!