Jeff,
Yes, for reasonably straight limbs, if the measurer lines himself/herself up in the vertical plane that includes the limb, then shouting to the base and tip of the limb and getting the angle between leads directly to the application of the law of cosines. I'm glad that you quickly saw this. We have many reasonably simple calculations that we can make to measure dimensions and distances for trees. Ents become stuck on the three common measurements of height, girth, and crown spread, but we can do so much more. Problem #2 will follow shortly. Your calculations are correct. I rounded off to one decimal place. Bob ----- Original Message ----- From: "Jeffs Email" <[email protected]> To: [email protected] Sent: Sunday, February 8, 2009 9:00:40 PM GMT -05:00 US/Canada Eastern Subject: [ENTS] Re: Bank of solved problems Bob, Learned something new there. I can see how Paul Jost applies this to determining tree height with this. I carried the decimal answer I had out to the third digit and ended up with 40.87 which matches up with the supplied answer. Assuming you stayed 'within the plane' of a limb, this could also be applied to limb length as well could it not? It would rely on your rangefinder being able to resolve only the target you want, but could be done, correct? This was my solution: For lack of characters on my phone, well substitute ^ for square and sqrt for square root. 65^ + 70^ - 2(65 x 70)cos35 4225 + 4900 - 7454.283 = 1670.717 sqrt1670.717 = 40.87 Jeff --~--~---------~--~----~------------~-------~--~----~ Eastern Native Tree Society http://www.nativetreesociety.org You are subscribed to the Google Groups "ENTSTrees" group. To post to this group, send email to [email protected] To unsubscribe send email to [email protected] For more options, visit this group at http://groups.google.com/group/entstrees?hl=en -~----------~----~----~----~------~----~------~--~---
