[tex]\it Fie\ dreapta\ \ (g):\ ax+by+c=0\ \ \c{s}i\ punctul\ A(x_o,\ y_o).\\ \\ d(A,\ g)=\dfrac{|ax_o+by_o+c|}{\sqrt{a^2+b^2}}[/tex]
[tex]\it d_1:\ 4x+3y-8=0,\ \ \ A(3,\ \ -4)\\ \\ d(A,\ \ d_1)=\dfrac{|4\cdot3+3\cdot(-4)-8|}{\sqrt{4^2+3^2}}=\dfrac{|12-12-8|}{\sqrt{25}}=\dfrac{^{2)}8}{\ 5}=\dfrac{16}{10}=1,6\ u.\ m.[/tex]
