Doubt with geometry problem

  • Thread starter david3305
  • Start date
  • #1
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Homework Statement


Find x. L1 and L2 are parallel

ex79.png

choices:
a)2°40'
b)2°30'
c)2°45'
d)2°15'
e)2°20'

Homework Equations


Σleft∠ = Σright∠

The Attempt at a Solution


2x+1+4x-1+4x-1 = 2x-1+2x+4+3x+2
10x-1=7x+5
3x=6
x=2°

Not sure how the answers include minutes '

Maybe I'm overlooking something?
 

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Answers and Replies

  • #2
35,264
11,519
I get the same result. Maybe an error in the book.
 
  • #3
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Yeah, that's what I think too. I'll leave this open just in case anybody has anything to add. Maybe another way of solving?
 
  • #4
NascentOxygen
Staff Emeritus
Science Advisor
9,244
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Quite possibly they made a typo when labelling the figure. You might be able to make a simple change to one of the coefficients or constants in the diagram to have it give their desired answer. :smile:
 
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  • #5
Aufbauwerk 2045
Is this for real? I've seen other problems with a similar sort of handwriting style, and wrong answers which are said to be from the mysterious "book." So what exactly is the "book?" and why do people post this sort of thing? Sorry if I am too cynical, but I could almost believe this is some kind of joke.
 
  • #6
6
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Lol. I felt doubt about this because most of the problems i have solved had a correct answer in the choices.
 

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