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Mathematics 12 Online
OpenStudy (milo123):

Help! http://prnt.sc/cyx0f5 http://assets.openstudy.com/updates/attachments/580fcb7de4b012711f1beeb2-milo123-1477430183138-screenshot20161025at4.08.46pm.png And here's what I have so far Part A: Dilation is a type of transformation that changes the size but not the shape of a figure. The scale factor of the dilation that transforms triangle PQR to triangle P'Q'R' is 1/2. 1/2 (8,0) = (4,0) 1/2 (6,2) = (3,1) 1/2 (-2,-4) = (-1,-2)

OpenStudy (quickstudent):

I'm sorry I don't have time now :( Please tag one of the other users

OpenStudy (milo123):

Here is what I've done so far @Directrix::::: Part A: Dilation is a type of transformation that changes the size but not the shape of a figure. The scale factor of the dilation that transforms triangle PQR to triangle P'Q'R' is 1/2. 1/2 (8,0) = (4,0) 1/2 (6,2) = (3,1) 1/2 (-2,-4) = (-1,-2) Part B: If P'Q'R' is reflected in y axis x coordinate will be same but y coordinate will be negative. P' ( 4,0) Q' (3,-1) R' (-1,2

OpenStudy (triciaal):

finally P (8,0) you have (0,8)

Directrix (directrix):

When you reflect a point across the y-axis, the y-coordinate remains the same, but the x-coordinate is transformed into its opposite. The reflection of the point (x, y) across the y-axis is the point (-x, y). http://www.regentsprep.org/regents/math/geometry/gt1/reflect.htm

OpenStudy (triciaal):

also check your R

Directrix (directrix):

I am not good on translations but am wondering if this is a true statement: If P'Q'R' is reflected in y axis x coordinate will be same but y coordinate will be negative.

OpenStudy (triciaal):

dilation changes the size not the shape CORRECT!1

OpenStudy (triciaal):

reflection across x-axis x the same y to -y reflection across y-axis y the same x to -x

OpenStudy (triciaal):

@Directrix what you wrote is correct (did not check the link)

Directrix (directrix):

Okay. So, @milo123 needs to change this sentence to read what? If P'Q'R' is reflected in y axis x coordinate will be same but y coordinate will be negative.

OpenStudy (triciaal):

no y axis so x changes

Directrix (directrix):

This? True or False? If P'Q'R' is reflected in y axis y coordinate will be same but x coordinate will be negative.

OpenStudy (triciaal):

yes true

OpenStudy (triciaal):

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