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katenka26
@katenka26
July 2022
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Помогите пожалуйста решить 4 и 7
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kprof
4. x-y = 120
x+y=180
x = 180-y
180-y-y=120
y = 30
угол1 = 150, угол2 - 30
угол3 = 150, угол4 - 30
7.
x+y = z
x+z=180
y+z = 180
x+x+y=180 => y = 180-2x
y+x+y=180 => 2*(180-2x) + x = 180
360 - 4x + x = 180
x = 60
угол1 = 120, угол2 - 60
угол3 = 60
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Answers & Comments
x+y=180
x = 180-y
180-y-y=120
y = 30
угол1 = 150, угол2 - 30
угол3 = 150, угол4 - 30
7.
x+y = z
x+z=180
y+z = 180
x+x+y=180 => y = 180-2x
y+x+y=180 => 2*(180-2x) + x = 180
360 - 4x + x = 180
x = 60
угол1 = 120, угол2 - 60
угол3 = 60