Mathematics 9709 · AS & A Level · Coordinate geometry

Coordinate geometry — practice question

Point $A$ has coordinates $(-3, 2)$, while point $C$ has coordinates $(5, 6)$. The midpoint of $AC$ is $M$, and the perpendicular bisector of $AC$ meets the $x$-axis at $B$.
(i)[5]

Find the equation of $MB$ together with the coordinates of $B$.

(ii)[2]

Show that $AB$ forms a right angle with $BC$.

(iii)[2]

Because $ABCD$ is a square, find the coordinates of $D$ and the length of $AD$.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: The midpoint is $M=(1,4)$, and the gradient is $\frac12$.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI