This is a simple one, but I think well worth it, and very cheap to make. For any of you taking Trigonometry or Physics this semester this actually might come in handy. You can use this to measure (with accurate results) the angles of elevation and depression. With these numbers you can then do lots of great things such as calculating the height of a building or a mountain (not as accurate, but close enough). I actually just used this little device to measure the height of the climbing wall at the gym in my workplace (that's right, my workplace has a climbing wall)!
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Signing UpStep 1What You'll Need
Protractor
Laser Pen or drinking straw
String or fishing line
Fishing Sinker
Gorilla Glue (Optional for extra strength)
That's it, not very expensive. You can get all of these things at walmart for less than $10. I happened to have all of them lying around.
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