Помогите по Геометрии

Question

Помогите по Геометрии

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Answer 1

1) 180*-(70*+70*) = 40*
2) (180*-40*)÷2 = 70*
3) 180*-120* = 60*
4) /_CBA = /_CAB = 60*
6) 180*-100*= 80*
(180*-80*) ÷ 2 = 50*
7) (180*-60*)÷2 = 60*
180* - 60* = 120*
8) 180*-70* = 110*
(180*-110*)÷2 = 35*