Определите координаты точек \(\displaystyle A{\small,}\ B{\small,}\ C\) и \(\displaystyle D{\small.} \)
\(\displaystyle A\big(\)[ ]; [ ]\(\displaystyle \big){\small;}\) \(\displaystyle B\big(\)[ ]; [ ]\(\displaystyle \big){\small;}\)
\(\displaystyle C\big(\)[ ]; [ ]\(\displaystyle \big){\small;}\) \(\displaystyle D\big(\)[ ]; [ ]\(\displaystyle \big){\small.}\)