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i need help in trig!

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i need help in trig!

by marmar29 » Fri Aug 19, 2011 11:53 am
a tree is 10 m ht ,, the distance between the top of the tree & its shadow is 15 m
wht is the lenght od the shadow ??
a 10.7
b 11.7
c.12.7
d.13.7
it came with me 11.1 ....is it the same as yrs
thanks
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by dmf5238 » Fri Aug 19, 2011 3:21 pm
It's a simple triangle problem

A^2 + B^2 = C^2

10^2 + B^2 = 15^2

B^2 = 125

B = 5√5, or yes it is approximately 11.18
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