Question

http://prntscr.com/96fll5

If triangle ABC is reflected over the y‐axis, reflected over the x‐axis, and rotated 180 degrees, where will point A' lie?

(−1, 2)
(−2, 1)
(1, −2)
(2, −1)

I'm pretty sure it's either B or D, but not sure which one.

Answer 1

Interesting... Need help? c;'

Answer 2

Just choosing between B and D. I've worked it out, but I can't figure out if the y-coordinate would be negative or not.

Answer 3

Wait, wouldn't it be B because I know the x-coordinate is negative..

Answer 4

First, do you know what a reflectio nis?

Answer 5

reflection is*

Answer 6

Yeah and I have the rules for the coordinate changes for each kind of reflection.

Answer 7

these are all notes I took and the notes that are helping me do these questions: http://prntscr.com/96fo6x

Answer 8

Reflection in which quadrant?

Answer 9

I don't understand the quadrant things in these questions, isn't it just changing the coordinates from negative or positive or their order? I don't see what quadrants have to do with it.

Answer 10

Cause none of the answer choices mach my answer http://i.imgur.com/SBOL202.png

Answer 11

Match*

Answer 12

If it's in quadrant 4 then yes It would be choice D

Answer 13

Well there's two reflections and one reflection.
Based on what I know and what I did, the answer should have a negative x-coordinate and I can't decide on a positive or negative y-coordinate.
That's the only thing I'm having a problem with.

Answer 14

See, I didn't think D that much because I figured the x-coordinate would be negative..

Answer 15

@TheSmartOne

Answer 16

I dont want to give you a wrong answer ;-; sorry... hope my friend comes and helps you

Answer 17

Apparently these questions are never as easy as they appear.
It's fine, I understand.

Answer 18

so which quadrant would the figure be if we reflected it across the y-axis?

Answer 19

it's in the second quadrant originally, right?

Answer 20

yup

Answer 21

so a reflection over the y-axis would bring it into the... first quadrant?

Answer 22

correct

and then a reflection over the y-axis would bring it from the first quadrant to which quadrant?

Answer 23

if it was basically re-reflected over the y-axis, that'd take it back into the second quadrant...
but if it was reflected over the X-axis, it'd go to the fourth quadrant.

Answer 24

so now it's in the fourth quadrant

and we're rotating it 180 degrees around the origin, so which quadrant would it be in? :)

Answer 25

that one I'm going to need a visual for. I'm not good with imagining rotations.

Answer 26

wait, would it be back in the second quadrant? I think...

Answer 27

yup

Answer 28

okay, so the A' coordinates have to be in the second quadrant, then?

Answer 29

so it'd be B, right?

Answer 30

@jigglypuff314