ajutatima la mate in poza
![Ajutatima La Mate In Poza class=](https://ro-static.z-dn.net/files/dd6/37dd1660df5796ce226c886dfede2da8.jpg)
Răspuns:
Explicație pas cu pas:
a)
∡ADB= 80°:2=40°
b)
∡ABD =30:2=15°
c)
arc DC= 360°-(140°+80°+30°)=360-250=110°
d)
∡BCD= (80+30):2= 55°
e)
∡ABC=(30+110):2= 70°