sea el angulo x.
x=(180-x)/3
efectuando
3x=180-x
4x=180
x=45
su complemento es 90 -45 =45 rpta b
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sea el angulo x.
x=(180-x)/3
efectuando
3x=180-x
4x=180
x=45
su complemento es 90 -45 =45 rpta b