The answer is 1/8 because he shaded obe out of eight parts
Set up a proportion
Units over actual height.
Then solve...for x by cross multiplying
Answer: 23
Step-by-step explanation: 18+5=23
23-5=18
R=23
A=42
C=90
B=48
We can reason that C will be equal to 90 since it is the right angle. So to find B we have to subtract 90 from 180 to get 90 then subtract 42 to get 48
B=48 degrees
