(main)[6]
Point $A$ is at $(-1, -5)$ and point $B$ is at $(7, 1)$. The perpendicular bisector of $AB$ crosses the $x$-axis at $C$ and the $y$-axis at $D$. Find the length of $CD$.
Mathematics 9709 · AS & A Level · Coordinate geometry
Point $A$ is at $(-1, -5)$ and point $B$ is at $(7, 1)$. The perpendicular bisector of $AB$ crosses the $x$-axis at $C$ and the $y$-axis at $D$. Find the length of $CD$.
This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Recognises points $A(-1,-5)$ and $B(7,1)$ together with midpoint $M(3,-2)” …