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ex 17,18.
Urgent!!!!!!Rezolvarea cu desen vreau.


Ex 1718UrgentRezolvarea Cu Desen Vreau class=

Răspuns :

16.(BD-bisectoare⇒m(∡ABD)=m(∡DBC)=50⇒m(∡ABC)=100°
m(∡C)=180-40-50=90°
In ΔADB
m(∡D)=180-40-25=115°

17.(AB-bis⇒m(∡CAB)=m(BAD)=20
m(DAC)=20+20=40
m(ACD)=180-40-50
m(ACD)=90
m(ABC)=180-20-90=70

18.m(BAE)=180-84-28=68
(AD-bis⇒m(BAD)=m(DAE)=34
m(BDA)=180-28-34=118
Sper ca te-am ajutat! ^..^