Answer:
D+42*=180*
D=180-42
138
Step-by-step explanation:
mark as brainiest please
138 Degrees
Because it is adjacent to the 42 degrees, just subtract 42 from 180 to get 138 degrees.
Answer: 4/5 = .8
cos adj/hyp of r is .8
HOWEVER...
I’m assuming it’s talking about angle R...
82.5% = 66/80
12/30