1. 3х+х=180
4х=180|:4
х=45(угол В) уголА=3*45
2. 180-108=72-вод
вос=72:2=36
вос=180-сод=180-64=116
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1. 3х+х=180
4х=180|:4
х=45(угол В) уголА=3*45
2. 180-108=72-вод
вос=72:2=36
вос=180-сод=180-64=116