Posted by DEEK on Friday, January 13, 2012 at 10:32pm.
a tree is standing upright.i want to cut it down at the base.how would i find out how tall it is. so that i could fall it without hitting any buildings.ie if it is 80 feet tall it should fall 80 feet?

geometry  Steve, Saturday, January 14, 2012 at 4:10am
Wait for a sunny day, not too near noon.
Stand next to it.
Measure your shadow, and the tree's shadow.
The tree's height will be in the same ratio as to your shadow.

geometry  raul, Wednesday, May 8, 2013 at 2:47pm
Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?
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