You may use the following figure to generate a series of interrelated surveying problems: find the height f the lighthouse (h).[br][br]Scroll down to find a set of slides for some suggested problems.

Drag the points of observation to see changes in the angles of elevation.[br]See how this figure can be modified to generate different problems:[br]https://youtu.be/iygHMpY3Avs?si=BT35cYewoFjIT5E4

Here are the same examples in[url=https://docs.google.com/presentation/d/1HpnOChuBhEPQpNZWi_dZUlVvTNF1AA8cpNbs6hifwAw/edit?usp=sharing] Google Slides[/url].