AFB = 48 degrees
DFB = 138 degrees
CFD = 90 degrees
In order to find AFB, we can see that AFC is equal to 90. We then subtract the 42 degree angle on the inside of it.
90 - 42 = 48
For the DFB angle, we know that we have a 90 degree angle plus the 42 degree angle. So we add them together.
90 + 42 = 132
Lastly CFD is a right angle and therefore is equal to 90.
