1. anonymous

2. anonymous

I got the answer as to what the vertices of th etriangle wld be but like does the transformation represent?

3. anonymous

Please don't use doc. just copy and paste question and chooses

4. anonymous

lol whtvr I used a pdf and most ppl dont have an issue with that

5. anonymous

It is coming from a pdf format so I have to print screen it

6. anonymous

Can u help me?

7. anonymous

huh

8. anonymous

ok i will try :/

9. anonymous

LOL ppl can help

10. anonymous

k

11. anonymous

im "traying to try"

12. anonymous

lol

13. phi

Do you know how to do the matrix multiplication?

14. anonymous

rows by columns?

15. anonymous

yes

16. anonymous

I did that

17. anonymous

I got the answer of the points of the triangle but i need to know abt the transformation

18. anonymous

you need to represent the transformation as a triangle?

19. anonymous

how it see pictorially?

20. anonymous

ummm ok they gave you the points of the traingle and then it asks u to transform by multiplying it by matrix A

21. anonymous

I was able to get the points of the two transformed triangles but i dont get what the transformation is

22. anonymous

tl;dr $\Large \begin{array}{l} A = \left[ {\begin{array}{*{20}{c}} 0&{ - 1}\\ 1&0 \end{array}} \right]\\ T = \left[ {\begin{array}{*{20}{c}} {\begin{array}{*{20}{c}} 1&2&3 \end{array}}\\ {\begin{array}{*{20}{c}} 1&4&2 \end{array}} \end{array}} \right]\\ AT = \left[ {\begin{array}{*{20}{c}} {\begin{array}{*{20}{c}} { - 1}&{ - 4}&{ - 2} \end{array}}\\ {\begin{array}{*{20}{c}} 1&2&3 \end{array}} \end{array}} \right]\\ AAT = \left[ {\begin{array}{*{20}{c}} {\begin{array}{*{20}{c}} { - 1}&{ - 2}&{ - 3} \end{array}}\\ {\begin{array}{*{20}{c}} { - 1}&{ - 4}&{ - 2} \end{array}} \end{array}} \right] \end{array}$

23. anonymous

Thanks FSM:D

24. anonymous

but like how wld i explain the transformation?

25. anonymous

26. anonymous

i dont know, may be you could construct some ideas from that.. sorry

27. anonymous

i think in the a) AT; the triange rotates

28. anonymous

Thnaks :D

29. anonymous

I drew all the triangles on a graph

30. anonymous

and in AAT; it rotates again?

31. anonymous

So it easier to see what happennned

32. anonymous

AAT it gets flipped in the y an dthen x axis

33. anonymous

It gets mirrored in the y=-x axis

34. anonymous

but AT is confusing

35. anonymous

It get mirrored in the y axis

36. anonymous

but then there seems to be another transformation

37. anonymous

i think it also he inverse

38. anonymous

I am not sure and doesnt seem like any1 else is either

39. anonymous

40. anonymous

41. anonymous

thanks it was a really good question

42. phi

A is rotating the triangle 90º counter clockwise around the origin. Notice that 2 of the rotations gives you 180º