Posted by Dan on Friday, November 2, 2012 at 10:02am.
We draw 2 rt. triangles with a common
ver. side and a shared hor. side with
X = hor. = X1 + X2 = Alexa's dist. from
X1 = Emma's dist. from the house.
X2 = The dist. between the girls.
Y = Ver. = 15 m.
tan60 = Y/X1 = 15/X1.
X1 = 15/tan60 = 8.66 m.
tan40 = Y/(X1+X2).
tan40 = 15/(8.66+X2)
8.66+X2 = 15/tan40 = 17.88
X2 = 17.88 - 8.66 = 9.22 m. = Dist.
between the girls.
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