PF erased my problem anyways triangle problem

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flyingpig
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Homework Statement




[PLAIN]http://img832.imageshack.us/img832/5249/unledhbk.png



The Attempt at a Solution



Alright PF just erased all my work so here is my work without LaTex because I am too frustrated to do this all again

Basically I found the vectors

QP = <7,8,0>

|QP| = √113 ≈ 10.630

RP = <7,0,-5>

QR = <0,8,-5>

The others follow the same logic

I have dinner now so I will write out how I got the angles.
 
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Discussion

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I don't know why, but the angle at Q is right when I used those magnitudes...
 
flyingpig said:
I don't know why, but the angle at Q is right when I used those magnitudes...
I don't get this result for the angle at Q. Why do you think this is a right angle?
 
Mark44 said:
I don't get this result for the angle at Q. Why do you think this is a right angle?

Because it says it's right. No I am not talking "right angle - 90", I am was talking about "correct angle"

Damn you English language
 
Why? What do you get for angle Q?
 
SammyS said:
Why? What do you get for angle Q?

50.434 degrees as I have.

Mark44 said:
OK - what's your question?

My length for the vectors are wrong
 
They look fine to me. Those are the values (the lengths) that I got, and they asked you to round to 3 dec. places. Sometimes these computer-graded things are brain-dead.
 
It asks for the exact values.

I.e. √(113)
 
Mark44 said:
They look fine to me. Those are the values (the lengths) that I got, and they asked you to round to 3 dec. places. Sometimes these computer-graded things are brain-dead.

Yeah I asked my professor about that and she has yet to respond...

I really hate lazy professors giving people online assignments
 
SammyS said:
It asks for the exact values.

But it says to round to three decimal places

EDIT: OH CMON! WHAT?? THAT'S SO MISLEADING!
 
The exact values for the lengths ... AND the angles rounded to 3 decimal paces.
 
SammyS said:
The exact values for the lengths ... AND the angles rounded to 3 decimal paces.

yeah I know, exact values =/= rounding.

I hate these stupid online problems, they just catch on picky reading mistakes
 
Why am I complaining to you?...sorry lOL
 
There really should have been better punctuation in the question.
 
SammyS said:
There really should have been better punctuation in the question.

Different clauses, it should be

"Find the exact values of the length ,and angle rounded to three decimal places"