July 2010
Intermediate to advanced
176 pages
7h 49m
English

Want to know the height of a person or building? Using simple trigonometric principles, you can closely estimate the height of objects with an easy-to-make hypsometer (hyps means height in Greek).
1. Make it.

Tape the straw along the top of the card. Punch a small hole in the right side of the card, 10cm from the bottom. Straighten the paper ...