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Mathematics 8 Online
OpenStudy (hang254):

Pentagon ABCDE and pentagon A'B'C'D'E' are shown on the coordinate plane below. Which two transformations are applied to pentagon ABCDE to create A'B'C'D'E'? translated according to the rule (x, y) → (x + 8, y + 2) and reflected across the y-axis translated according to the rule (x, y) → (x + 2, y + 8) and reflected across the axis translated according to the rule (x, y) → (x + 2, y + 8) and reflected across the y-axis translated according to the rule (x, y) → (x + 8, y + 2) and reflected across the axis

OpenStudy (hang254):

OpenStudy (hang254):

@Chlorophyll

OpenStudy (hang254):

@ash2326

OpenStudy (hang254):

@Ganpat

OpenStudy (ash2326):

Would you please tell me the coordinates of D and D'? @hang254

OpenStudy (hang254):

D=-3,-5 D'=1,3

OpenStudy (ash2326):

We can see that Pentagon is also reflected across y-axis so first we add something and then reflect it , reflection will change the sign of x- coordinate Would you change the sign of x- coordinate of D' and tell me?

OpenStudy (hang254):

-1 @ash2326

OpenStudy (ash2326):

good how can you get -1 from -3?

OpenStudy (hang254):

add 2, to -3. -3 + 2= -1

OpenStudy (hang254):

@ash2326

OpenStudy (ash2326):

good so it's x+2 and then reflect across y- axis Now, how to get 3 from -5?

OpenStudy (hang254):

-5+8=3. 8

OpenStudy (hang254):

i see it now. "translated according to the rule (x, y) → (x + 2, y + 8) and reflected across the y-axis" Thanks @ash2326

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