Exercise 22 Page 41

The expression m∠ FCB tells us to find the measure of the angle between two rays, CF and CB. We have marked this angle with red angle marker in the figure below.

To find m∠ FCB, we must subtract m∠ BCD from m∠ FCD. ∠ FCB= 130^(∘)- 95^(∘)= 35^(∘)