What is distanse between (-13,9) and (11,2) on a coordinate gird.
angielski
źródło:
A = (-13,9) B = (11,2) |AB|=\sqrt{(x_B-x_A)^2=(y_B-y_A)^2}
{|AB|=\sqrt{[11-(-13)]^2+(2-9)^2}=\sqrt{(11+13)^2+(-7)^2}=\sqrt{576+49}=\sqrt{625}=25}