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Mathematics 14 Online
OpenStudy (anonymous):

Pentagon ABCDE is shown on the coordinate plane below.

OpenStudy (anonymous):

OpenStudy (anonymous):

If pentagon ABCDE is rotated 180° around the origin to create pentagon A'B'C'D'E', what is the ordered pair of point D'?

OpenStudy (anonymous):

Select one: a. (-1, 2) b. (2, 1) c. (1, -2) d. (-2, -1)

OpenStudy (anonymous):

Hey did you try drawing it out yet?

OpenStudy (anonymous):

@ganeshie8

ganeshie8 (ganeshie8):

have a look at pic wat are the coordinates of point D ?

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

1, -2

ganeshie8 (ganeshie8):

Yes ! use the 180 degree rotation to that point :- (x, y) -----> (-x, -y)

OpenStudy (anonymous):

sp its d

ganeshie8 (ganeshie8):

(1, -2) -----> ?

ganeshie8 (ganeshie8):

no, try again

ganeshie8 (ganeshie8):

you need to flip both x and y signs

OpenStudy (anonymous):

so A then

ganeshie8 (ganeshie8):

(x, y) -----> (-x, -y) (1, -2) ----->(-1, --2) (1, -2) ----->(-1, 2)

ganeshie8 (ganeshie8):

A is \(\large \color{red}{\checkmark}\)

OpenStudy (anonymous):

thnx a lot

ganeshie8 (ganeshie8):

np :)

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