2) <В=40°
<А=180°-110°=70°
<С=180°-(70°+40°)=180°-110°=70°
3) 1:2:3
А=х
В=2х
С=3х
Решение:
х+2х+3х=180°
6х=180°
х=30°=А
2×30°=60°=В
3×30°=90°=С
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2) <В=40°
<А=180°-110°=70°
<С=180°-(70°+40°)=180°-110°=70°
3) 1:2:3
А=х
В=2х
С=3х
Решение:
х+2х+3х=180°
6х=180°
х=30°=А
2×30°=60°=В
3×30°=90°=С