Question

matematica ex 9 clasa 8 a cat de repede posibil

Answer 1

Răspuns:

Explicație pas cu pas:

Answer 2

$\it a)\ \ \alpha \cap \beta=BC\\ \\ b)\ D\not\in\alpha;\ \ A\in (d,\ g);\ \ AD\not{\subset}\ \alpha;\ \ \ AD\subset\ (e,\ f)\\ \\ \\ c)\ \ (d,\ e)\cap(f,\ g)=\alpha\cap\beta=BC$