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The Challenge: Create a Scale Map



Because some of the island's Northern coastline is inaccessible, we needed another way to measure the parts we couldn't visit. This is where trigonometry comes in.

First, you mark out a baseline on the ground that is as flat as possible. We needed a method of measuring angles, so we made a giant protractor. The angles were marked on it using a folded circle of paper and a 10mm (about 0.4 in.) spanner (wrench) as a guide.

Folding paper to produce angles
Kathy making a protractor
Kathy making a protractor