Răspuns:
sper ca te-am ajutat
Explicație pas cu pas:
2.
<AOC+<COB=180 grade
<AOC=3x
<COB=x
=> <AOC+<COB=3x+x=4x=180grade
=> x=180:4 => x=45 grade
=> <AOC=135 grade
=> <COB=45 grade
<AOC+<COB=180 grade
<AOC=x
<COB=x+100
=> x+x+100=180
=> 2x=180-100
=> 2x=80
=> x=40
=> <AOC=40 grade
=> <COB=140 grade
<AOC+<COD+<DOB=180 grade
<AOC=102 grade
<COD=2x
<DOB=x
=> 102+2x+x=180
=> 3x=180-102
=> 3x=78
=> x=26 grade
<AOC+<COD+<DOF+<FOB=180 grade
<AOC=2x
<COD=3x
<DOF=72 grade
<FOB=x
=> 2x+3x+72+x=180
=> 6x=180-72
=> 6x=108 grade
=> x=18 grade
=> <AOC=36 grade
=> <COD=54 grade
=> <FOB=18 grade
=> <DOF=72 grade
<AOC+<COB=180
<AOC=x
<COB=3x+20
=> x+3x+20=180
=> 4x=180-20
=> 4x=160
=> x=40 grade
=> AOC=40 grade
=> <COB=140 grade
<AOE+<EOD+<DOC+<COB=180 grade
<AOE=60 grade
<EOD=2x+40
<DOC=2x
<COB=x
=> 60+2x+40+2x+x=180
=> 5x=180-60-40
=> x=80:5
=> x=16 grade
=> <AOE=60 grade
=> <EOD=72 grade
=> <DOC=32 grade
=> <COB=16 grade
