3.2.11 Lines on a plane
condition: Calculate the coordinates of the vertex of a rhombus if the equations of its two sides are known: \( x+2 y=4 \) and \( x+2 y=10 \), and the equation of one of its diagonals: \( y=x+2 \).
Equation of a straight line on a plane. Finding the equations of heights, bisectors and medians of a triangle, the intersection of lines.