Answer:
For the first one it is D.
Step-by-step explanation:
I added 84.6 and 30.4 which gives me 115. I then added 66 to get 181, triangles angles only add up to 180 degrees, therefore they are not similar.
It was about 17.4%
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% error=
actual value-estimated value
Then divide that by actual value
Answer: 1 5/12
Step-by-step explanation:
Divide 17 by 12
The answer are both:
x=2+4i,2-4i