Iain’s car has run out of petrol. He walks $12$12 km west and then $9$9 km south looking for a petrol station.

If he is now $h$h km directly from his starting point, find the value of $h$h.

Consider the following figure.

Consider the following trapezium.

Consider the following diagram.

Use trigonometric ratios and Pythagoras’ theorem in two and three dimensions

Apply geometric reasoning in solving problems

Apply right-angled triangles in solving measurement problems