Ответ:
1) 180-71°30'=108°30'
2) х+3.5х=180
4.5х=180
х=40-кут 1
40*3.5=140°-кут 2
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Ответ:
1) 180-71°30'=108°30'
2) х+3.5х=180
4.5х=180
х=40-кут 1
40*3.5=140°-кут 2