A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

∆ABC is reflected about the line y = -x to give ∆A'B'C' with vertices A'(-1, 1), B'(-2, -1), C(-1, 0). What are the vertices of ∆ABC? A(1, -1), B(-1, -2), C(0, -1) A(-1, 1), B(1, 2), C(0, 1) A(-1, -1), B(-2, -1), C(-1, 0) A(1, 1), B(2, -1), C(1, 0) A(1, 2), B(-1, 1), C(0, 1)

  • This Question is Open
  1. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Use the transformation for reflection about y=-x s'(x,y): (x,y) -> (-y,-x) and the inverse transformation is the identical (as is true with all reflections) \((s')^{-1} : (x,y) -> (-y,-x)\) For example, a point P(5,2) is reflected about y=-x, then P' is P'(-2,-5) Calculate A, B, C point by point from the transformation of A', B', C' and you would find the answer in very little time.

  2. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i still am not understanding....what would the answer be ... @mathmate

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    i think it would be A(1, 2), B(-1, 1), C(0, 1) right

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    err no it would be A(-1, 1), B(1, 2), C(0, 1)....

  5. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Please read the example showing you how to do the transformation? The transformation is (x,y) ->(-y,-x) so (5,2)->(-2,-5) Another example: If P' is P'(4,-3), the P after transformation is P(3,-4). Remember, in math, if you do not understand, ask how it works. Guessing game is a game for life, you'll never get anywhere.

  6. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    Yes, A(-1, 1), B(1, 2), C(0, 1). is correct. Well done!

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    thank you

  8. mathmate
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 2

    You're welcome! :)

  9. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.