can someone help me im stuck :/

Question

leonardo0430 · Answer

attachment

leonardo0430 · Answer

i guess i really didnt understood it since it didnt state the original triangle

anonymous · Answer

are you in connexus

leonardo0430 · Answer

no

anonymous · Answer

@leonardo0430, firstly take a point, say C, and tell me the coordinates. Secondly, tell me the coordinates of the rotated point, C'.

anonymous · Answer

o kant help ya

leonardo0430 · Answer

would the first C point be in the black triangle?

leonardo0430 · Answer

what i got is -x and -y but it says i got it wrong

anonymous · Answer

yes

freckles · Answer

@tom982 has a great approach to the question
can you tell us what coordinates you have for C and C'?
C is in black while C' is in blue

anonymous · Answer

C is found at (2,-2). C' is found at (-2,2). Can you spot which map will do this?

anonymous · Answer

Sorry @freckles, hadn't seen what you'd said!

leonardo0430 · Answer

so basically they would flip , x would be in y and y would be in x, (-y,x) ?

freckles · Answer

you also might want to look at the other points too ... to help you see what is going on

anonymous · Answer

x=2 is changing to x=-2, so we know our function changes from (x,y) to (-x,?). Can you repeat what I did to see what y changes to (the question mark).

leonardo0430 · Answer

y-2 is changing to y+2 so it would be -x,y ?

anonymous · Answer

y=-2 is changing to y=2. So again it's becoming the negative of what it was as -2*-1=2. Do you understand why?