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Estimation
Specialised observation. Calculated guess.
Use aids eg. personal measurements. Hand span etc.
Game estimation golf.
One boy challenges another to a guessed or estimated measurement. If correct (by measurement) gain a "hole". If not lose a "hole".
Similar triangles
A:D, F:C, B:E.
This is a scan of a page from the Gilwell Note Book for Woodbadge Training for Roger H. Tingle, 37th Wolverhampton Sea Scouts from the 1960s.
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