Question

Ex 6 reoedeee va rog.

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

Răspuns:

mas.∡A=66°

mas.∡B=33°

mas.∡C=81°

Explicație pas cu pas:

mas.∡A+mas.∡B+mas.∡C= 180°

mas.∡A=2·mas.∡B

mas.∡C-mas.∡B=48°  ⇒mas.∡C=48°+mas.∡B Inlocuim aceste relatii in prima ecuatie mas.∡A+mas.∡B+mas.∡C= 180°  ⇒2·mas.∡B+mas.∡B+48°+mas.∡B=180°  ⇒4·mas.∡B=180°-48°  ⇒4·mas.∡B=132°  ⇒mas.∡B=33°

mas.∡A=2·mas.∡B  ⇒mas.∡A=2·33°  ⇒mas.∡A=66°  ⇒mas.∡C=48°+mas.∡B  ⇒mas.∡C=48°+33°  ⇒mas.∡C=81°

Proba: mas.∡A+mas.∡B+mas.∡C= 66°+33°+81°=180°