Ответ:
Объяснение:
1) 180 - 25 = 155
2) ABC = 142, ABF = 180-142=38
3) DBC = 180-b; ABF = 180-a; DBF = b+180-a
4) ADB = 120 = FDC ⇒ BDC = ADF = 180-120 = 60;
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Ответ:
Объяснение:
1) 180 - 25 = 155
2) ABC = 142, ABF = 180-142=38
3) DBC = 180-b; ABF = 180-a; DBF = b+180-a
4) ADB = 120 = FDC ⇒ BDC = ADF = 180-120 = 60;