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Mathematics 16 Online
OpenStudy (wintersuntime):

Can someone be nice enough to help me please

OpenStudy (wintersuntime):

OpenStudy (wintersuntime):

Transformation figure A B C 6 units right and 8 units down. Then Reflect it over the line y= -x

OpenStudy (wintersuntime):

@mathmale

OpenStudy (mathmale):

Did you actually draw the line y=-x and then reflect the figure across that line as instructed?

OpenStudy (wintersuntime):

|dw:1464054114369:dw|

OpenStudy (wintersuntime):

like that ?

OpenStudy (wintersuntime):

@mathmale

OpenStudy (mathmale):

Yes, that's good. My next question: Did you actually reflect any figure in the line y=-x? Please note that one of your figures has four sides, whereas the other has only three. That can't be right.

OpenStudy (wintersuntime):

what can't be right ?

OpenStudy (mathmale):

You began with a triangle (ABC) and ended up with a quadrilateral (four-sided figure).

OpenStudy (wintersuntime):

no thats a different one i have to do

OpenStudy (wintersuntime):

I have to rotate that one 180 degrees about the origin

OpenStudy (mathmale):

that's why I had to ask for clarification! One problem at a time, please. In regard to the triangle, tell me again what you have to do with it.

OpenStudy (wintersuntime):

I don't know how to rotate it sadly

OpenStudy (mathmale):

Please focus on ONE problem. Which will it be? Triangle or quadrilateral?

OpenStudy (wintersuntime):

quadrilateral

OpenStudy (mathmale):

OK. Take a pencil and cross out the triangle. We will not use it at all while talking about the quadrilateral.

OpenStudy (mathmale):

What were you supposed to do with the quadrilateral?

OpenStudy (wintersuntime):

okay

OpenStudy (wintersuntime):

but I don't have the paper my friend send it to me

OpenStudy (mathmale):

I'm sorry, I really am having trouble helping you ... if you post two problems at the same time and don't distinguish between them, and if you don't have the instructions for the problem. It might be better if you quit now and repost your question after you've gotten the full illustration and full instructions from your teacher.

terenzreignz (terenzreignz):

Ugh... THIS kind of question. They tend to get me dizzy~ haha But... if you're on board, @wintersuntime Maybe we can sort this out. Are you still here?

OpenStudy (wintersuntime):

yes

terenzreignz (terenzreignz):

Okay. Let's work on the triangle first. Now, I'm terrible at drawing, so first, I want you to identify the VERTICES of the triangle ABC As in, what are the coordinates of points A, B, and C. Can you do that?

OpenStudy (wintersuntime):

B (2,1) A(1,8) C(-2,3) ??

OpenStudy (wintersuntime):

I'm so dumb at this

terenzreignz (terenzreignz):

You know that's not true ^^ You are perfectly capable of understanding this, and if you don't understand it now, I'll help you out :) Now, we're going to transform this triangle by transforming its vertices. As in, change their coordinates. I believe the first instruction was to move it 6 units right. You know how to do that?

OpenStudy (wintersuntime):

thanks c: and I think I do

OpenStudy (wintersuntime):

we move 6 units right and down 8?

terenzreignz (terenzreignz):

Transformation in a nutshell: \[\Large \left.\begin{matrix}\text{Old Point} & \text{New Point}\\ (\color{red}x , \color{blue}y) & (??? , ???)\end{matrix} \right.\]

terenzreignz (terenzreignz):

Well anyway, transformation, as its name suggests, transforms a point into another point. following a certain rule. So, how do you move a point six units to the right?

OpenStudy (wintersuntime):

You have to go to the point of any letter so I went to the point of A and then moved it 6 units right and 8 units down

OpenStudy (wintersuntime):

|dw:1464058129820:dw|

OpenStudy (wintersuntime):

something like that ? I got that

terenzreignz (terenzreignz):

Well yes, we could do that, but let's forget the drawing first, and focus on the points. Because they're more systematic, if you know what I mean. And a LOT easier to write :P I'll get you started. To transform a point by MOVING IT SIX UNITS TO THE RIGHT, you simply ADD 6 to the x-coordinate. Like so: Six Units to the Right: \[\Large \left.\begin{matrix}\text{Old Point} & \text{New Point}\\ (\color{red}x , \color{blue}y) & (\color{red}{x+6} ,\color{blue}y)\end{matrix} \right.\] So what happens to points: A(1,8) B(2,1) C(-3,3) ?

terenzreignz (terenzreignz):

Come on~ just add 6 to all the x-coordinates. The ones on the left ^^ For instance, the new point A (let's call that A') is A'(7,8) So what about B' and C'?

OpenStudy (wintersuntime):

okay I got it thanks for helping me

terenzreignz (terenzreignz):

It's not yet finished. But if you're sure... then okay

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