maths

1. Treasure hunt with
Geogebra
by Michael Koert, Finn-Niklas C., Lara B.

2. How does it work?
The objective of this treasure hunt is to use geometric
constructions to find a hidden treasure on a map.
For motivation I first presented a short part of the film „Pirates of
the Carribean“.
Then the students got a map in Geogebra-file with a map and a
letter of one of the pirates who explains the way to the key.
The students have to translate the letter into math language, in
special in geometric constructions.
I blocked some of the funktions of Geogebra, so the students
really have to work only with compass and ruler, (like they do it in
class tests).

3. Options:
In a second step, the students should create an own
treasure hunt!
Here are different options:
They can use the given map and write a new letter of a
pirate with other hints.
They can use a new map of a city, a country or an other
island. Of course they have to write a new letter or
maybe a completly different story.

4. The letter

5. Now they have to „translate“ the
hints into „math language“:
For example „It lays under the
earth thirty meters away from the
„Quelle“ (= source) means to draw
a circle with the radius 3.

6. The solution (including all details
of construction)
key
treasure

7. The solution (including all details
of construction)
key
treasure