finding the length

**funky_monk** · Nov 5th 2007, 05:15 PM

I need to find the length of LT in the attached picture. What is the answer and how do you work it out?

Thanks.

**Seven7** · Nov 5th 2007, 05:54 PM

similar triangles...

arctan(50/75) = 33ish

cos(33ish) * 25 = LT

**funky_monk** · Nov 5th 2007, 07:21 PM

thank you for that. can someone find out what LP is? thanks.

**CaptainBlack** · Nov 5th 2007, 08:05 PM

Originally Posted by funky_monk

thank you for that. can someone find out what LP is? thanks.

LP is the hypotenuse of a right triangle who's other sides are 25m and 50m
so using Pythogora's theorem we have:

LP^2 = 25^2 + 50^2

RonL

**funky_monk** · Nov 5th 2007, 08:08 PM

Originally Posted by CaptainBlack

LP is the hypotenuse of a right triangle who's other sides are 25m and 50m
so using Pythogora's theorem we have:

LP^2 = 25^2 + 50^2

RonL

So is the final answer 55.9?

**CaptainBlack** · Nov 5th 2007, 08:31 PM

Originally Posted by funky_monk

So is the final answer 55.9?

That is what my calculator says.

RonL

Thread: finding the length