Vectors and similar triangles

  • Thread starter LiHJ
  • Start date
  • #1
43
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Homework Statement



Dear Mentors and PF Helpers,

Here's the question:

image.jpg


Homework Equations




The Attempt at a Solution



Here's my solutions:

Please let me know whether I'm right. Thank you

image.jpg

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Answers and Replies

  • #2
NascentOxygen
Staff Emeritus
Science Advisor
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Hi LiHJ. How would you justify saying PQ is half the length of SR?

Edit: the rest looks right, though you are a bit rough & ready with the geometry. PQRS shouldn't be designated using the Δ symbol! :)
 
  • #3
43
2
Because the question mention that Q is the midpoint of OR and PQ is parallel to SR. So triangle OPQ is similar to triangle OSR. Therefore P is a midpoint of OS
 
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Likes NascentOxygen
  • #4
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Thank you;)
 

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