Posted by Debbie on Tuesday, December 9, 2008 at 7:56pm.
they probably wanted you to set up 2 similar triangles and set up a ratio.
let the height of the tree be h m
then h/5 = 1/.4
cross-multiply to get .4h=5
h=5/.4 = 12.5 m
so the tree is 12.5 m high.
I know you got that numerical answer but I didn't like the way you made your statements
e.g.
1m = .4m makes no sense, 1m cannot be .4m
(I know this might seem petty, but to mathematicians this is just as grating as bad grammar is to an English teacher.)
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