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/sci/ - Science & Math

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1734449 No.1734449 [Reply] [Original]

This is NOT a homework problem, I saw this on another board and cannot find x. Is it solvable?

>> No.1734459

Yes. Yes it is.

>> No.1734460

Yes, it's solvable. It is too a homework problem.

>> No.1734458

Where were you during the summer?
It took us a week to solve this because it was being posted everyday.

>> No.1734469

>>1734458
I don't really go on 4chan during the summer.

Anti-summer fag here

>> No.1734471

youre fucking retarded

>> No.1734483

>>1734471
Sure is hard to find an apostrophe, the shift key and end your sentence with correct punctuation.

>> No.1734491

x = 10

>> No.1734493

Your not allowed to use trig.

Solve it using only basic geometry. It'l take you like 10 hours of proofs

>> No.1734498

>Get a protractor
>Measure angle x
>????
>PROFIT

>> No.1734499

You need to add a bunch of lines of your own

>> No.1734502

should be easy with law of sines

>> No.1734508

You know three things about the primary triangle. A and B are both 80˚. Assume AB is 1.

1: Find BD for triangle ABD.

2: Find BE for triangle ABE.

3: D for BDE and 'x'DE is the same. Find D.

4: Find E for BDE.

5: Find E for ABE.

Solution: x is the angle E for BDE minus the angle for ABE. x is constant for all factors of the primary triangle.

>> No.1734514

it's 110 degrees you faggot.

>> No.1734519

Writing this - >>1734508

Then reading this - >>1734493

I thought, vectors would be perfect for this problem.

But then I thought, eh, why bother?

>> No.1734529

It's been on /sci/ about a million times before. You need to draw another 3 lines or so inside the triangle in order to find x.

>> No.1734536

It's doable, all you need to remember is that angles inside a triangle add to 180 degrees.
It's a little long, but you can solve for any angle in that diagram.

>> No.1734550

>>1734529

Why?

>> No.1734555

http://thinkzone.wlonk.com/MathFun/Triangle.htm

>> No.1734568

Here, cause I'm nice.
http://blogs.sun.com/simford/entry/solved_the_world_s_hardest

>> No.1734656
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1734656

it only took me long cause i suck at eligibility when using a mouse

>> No.1734679

>>1734656
You miscalculated the last bit. Two angles of 20 degrees in a triangle and another angle of 150, when it should be 140.

>> No.1734733

>>1734656
There is so much fail in that post (including the text) it's actually quite beautiful.