Can anyone help me with this geometry proof

m∠3 = 57° → proved down

Step-by-step explanation:

The given is:

We want to prove that m∠3 = 57°

∵   // and is the transversal → given

∴ m∠1 = m∠2 → corresponding angles

∵ m∠1 = 123° → given

∴ m∠2 = 123° → equality of two corresponding angles

∵ // and is the transversal → given

∴ m∠2 + m∠3 = 180° → interior supplementary angles  

∵ m∠2 = 123° → proved

∴ 123 + m∠3 = 180 → subtract 123 from both sides

∴ m∠3 = 57° → inverse addition property

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %

the answer is  

d.

121π mi^2

hope you got it chief