The rotation shown is clockwise 90 degrees about the origin. Point A is located at (-2,1). Name the ordered pair in (x,y) notation for A’.
Answer

(1,2)

(6,1)

(-2,1)

(-1,-2)

Question

The rotation shown is clockwise 90 degrees about the origin. Point A is located at (-2,1). Name the ordered pair in (x,y) notation for A’.
Answer
		
(1,2)
		
(6,1)
		
(-2,1)
		
(-1,-2)

anonymous · Answer

http://prntscr.com/5leelx

jhannybean · Answer

what is over 1, up 3?

anonymous · Answer

wait what

anonymous · Answer

it would be -1 and 4

directrix · Answer

>> Should this For A', count 1 over in the x direction, and up 3 in the y direction.

be For A', count 4 over in the x direction, and up 1 in the y direction. ?

Just wondering.  @Jhannybean

directrix · Answer

Or, maybe over 3 and up one?

mathmath333 · Answer

take a look here https://www.desmos.com/calculator/fmkcw9umkd

mathmath333 · Answer

the point the $A'$ is rotated 90 degrees therefore it must on line which is perpendicular to the line which  passing through the point$(-2,1) ~~and~(0,0)$

jhannybean · Answer

I was simply looking at the purple triangle and counting the coordinates.... haha

directrix · Answer

No worries. This transformation geometry always has me with spots before my eyes

directrix · Answer

@kittymeow101   What did you get as an answer?

mathmath333 · Answer

and it is given clockwise 

 so it will move towards the east direction

perl · Answer

you can multiply the point A by the rotation matrix