Answer:
f^-1(x) = x - 18
Step-by-step explanation:
y = x + 18
x = y + 18
x - 18 = y
f^-1(x) = x - 18
The longest angle would be across from the one with the longest side. In this case it would be across from DF
If you're trying to find the perimeter of a specific problem, you can add a file. To solve perimeter for any problem, you add all the side lengths. Hope that helps! :)
Sin(theta) = opposite/hypotenuse
Sin(41 deg) = 2.5/x
Xsin(41) = 2.5
X = 2.5/sin(41)
X = 3.8
