1.
А=В=70°
D=180°-(70°+70°)=40°
2.
C=B=70°
A=40°
угол ABD=180°-70°=110°
3.
C=B=70°
K=40°
ABK=180°-70°=110°
DBA=180°-110°=70°
4.
C=90°-40°=50°
C=A=50°
ABD=DBC=40°
B=40°+40°=80°
5.
D=90°-50°=40°
D=A=40°
DBC=CBA=50°
CBA=50°+50°=100°
6.
K=90°-30°=60°
K=C=60°
CBM=MBK=30°
CBK=30°+30°=60°
ABK=180°-60°=120°
DBA=180°-120°=60°
Объяснение:
