Question

Помогите мне по геометрии.

Answer 1

<2=<1+30°
m||n ;<1+<2=180°
<1+<1+30°=180°
2•<1=150°
<1=150:2
<1=75°
<2=<1+30°=105°
2)a||b
<2=<5;
<2+<5=240°
2•<2=240°
<2=120°
<5=120°
<6=180°-<2=180°-120°=60°
<6=<1=60°
<4=<5=120°
<3=<1=60°;<2=<7=120°;<8=<6=60°
3)<1=40°;<2=75°
<1=<CEF=40°
<DEF=<2+<CEF=75°+40°=105°