Question

Buna! Am nevoie de ajutor rapid. Dau coroana. Cu rezolvare completa de clasa a saptea. ​

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it AB-diametru \Rightarrow m(\widehat{BCA})=90^o \Rightarrow \Delta BCA\ -\ dreptunghic\ \^{i }n\ C$

$\it m(\widehat{B})=\dfrac{m(\stackrel\frown{CA})}{2}=\dfrac{120^o}{2}=60^o \Rightarrow m(\widehat{A})=30^o\ (complementul\ lui\ 60^o)\\ \\ \\ AB=2R=2\cdot4=8\ cm\\ \\ Th.\ \angle30^o \Rightarrow BC=\dfrac{AB}{2}=\dfrac{8}{2}=4\ cm\\ \\ \\ BC\perp AC \Rightarrow d(B,\ \ AC)=BC=4\ cm$