# Treasure Trove

Purpose

This is a level 3 geometry activity from the Figure It Out theme series.
A PDF of the student activity is included.

Achievement Objectives
GM3-5: Use a co-ordinate system or the language of direction and distance to specify locations and describe paths.
Student Activity

Click on the image to enlarge it. Click again to close. Download PDF (838 KB)

Specific Learning Outcomes

use co-ordinates to describe and locate positions

Required Resource Materials
FIO, Level 2-3, Theme: Under the Sea, Treasure Trove, pages 6-7

A classmate

2 photocopies of the grid (one for each player) in the Student book

Activity

#### Game

This game is a version of the traditional game Battleships, which uses ordered pairs on a co-ordinate grid to specify position. Since the “treasure chests” are represented by multilink cubes, which have an area of 2 cm x 2 cm, students can think strategically about which co-ordinates (ordered pairs) to choose.
For example, finding out that B 2 is not a co-ordinate for a treasure chest effectively eliminates the co-ordinates A 1, A 2, and B 1. If E 2 also is not a co-ordinate for a chest, that effectively eliminates C 1, C 2, D 1, D 2, and E 1. Note that this strategy is good for locating the approximate position of treasure chests, but to finish the game, students must give all four corner co-ordinates of each chest.
An interesting variation of the game is for students to use 16 unit place-value cubes to make four “gold nuggets”. These nuggets can take any shape the player wants them to within the squares.
For example: