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Brilliant_brown [7]
3 years ago
15

Help please? its geometry ​

Mathematics
1 answer:
vovikov84 [41]3 years ago
8 0

Answer:

∠4=135

Step-by-step explanation:

vertical angles are always equal

∠1=∠3

3x-9=x+27

3x-x=27+9

2x=36

x=36/2=18

∠1 =3x-9

∠1=3(18)-9

∠1=54-9=45

∠1+∠4=180 degrees

45+∠4=180

∠4=180-45

∠4=135

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