Mathematics 9709 · AS & A Level · Coordinate geometry

Coordinate geometry — practice question

The diagram depicts a trapezium $ABCD$ with $A$, $B$ and $C$ at $(4, 0)$, $(0, 2)$ and $(h, 3h)$ respectively. $BC$ is parallel to $AD$, $ngle ABC = 90^\circ$ and $CD$ is parallel to the $x$-axis.
(i)[3]

Find the value of $h$ by calculation.

(ii)[3]

Hence determine the coordinates of $D$.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: Gives gradient of $AB = -\frac{1}{2}$ and therefore gradient of $BC = 2$.

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