# SPM 2021 Add Maths Trial Paper (Selangor) – Paper 1 (Question 7)

Question 7:
Solutions by scale drawing is not accepted.

Diagram 2

Diagram 2 shows a trapezium ABCDE where BC is the height of the trapezium ABCDE.
Find
(a) the value of k, (2 marks)
(b) the coordinates of point C. (4 marks)

Solution:
(a)

$\begin{array}{l}{m}_{AB}={m}_{ED}\\ \frac{4-3}{7-4}=\frac{0-\left(-1\right)}{k-0}\\ \frac{1}{3}=\frac{1}{k}\\ k=3\end{array}$

(b)