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Geometry 20 Online
OpenStudy (anonymous):

Δ DOG has coordinates D (3, 2), O (2, -4) and G (-1, -1). A translation maps point D to D' (2, 4). Find the coordinates of O' and G' under this translation.

OpenStudy (anonymous):

Select one: a. O' (-1, 1);G' (1, -2) b. O' (3, 0);G' (-1, -1) c. O' (0, -3);G' (-3, 0) d. O' (1, -2);G' (-2, 1)

OpenStudy (anonymous):

@Directrix can you help me please

Directrix (directrix):

Well, I'm not good on these but I'll hit it (or something) with my best shot. D(3,2) and D' is (2,4). So, the translation took 3 to 2 and then 2 to 4. So, I'm thinking the translation is (x,y) --> (x - 1, y + 2)

Directrix (directrix):

@Edge can you help me please

OpenStudy (anonymous):

im back srry bout that

Directrix (directrix):

What did you get for O'

Directrix (directrix):

So, take point O, O (2, -4), and subtract 1 from its x-coordinate and then add two to its y-coordinate and post what you get.

OpenStudy (anonymous):

ummm...

Directrix (directrix):

2 - 1 = ? -4 + 2 = ?

OpenStudy (anonymous):

I had to go do something so im lost

Directrix (directrix):

Just answer this: 2 - 1 = ? -4 + 2 = ? @Edge

OpenStudy (anonymous):

am I supposed to fing coordintes or something

Directrix (directrix):

I asked you to do these calculations. If you do not want to do them, let me know. 2 - 1 = ? --> Two minus one = ? -4 + 2 = ? --> Negative four plus two = ?

OpenStudy (anonymous):

ok 2-1=1 obviously and -4+2=-6

OpenStudy (anonymous):

no its not -6 its -2

Directrix (directrix):

Okay, so O (2, -4) is sent to O' (1, -2).

OpenStudy (anonymous):

yes.. im starting to get it

Directrix (directrix):

Look in the options and find the one that looks like O'(1, -2).

OpenStudy (anonymous):

it would be D right

Directrix (directrix):

Yes. I'm thinking we need to check G to G'

OpenStudy (anonymous):

uhmmm ok then

Directrix (directrix):

G (-1, -1) to G' (x,y) --> (x - 1, y + 2) What is -1 - 1 = ? What is -1 + 2 = ?

Directrix (directrix):

@Edge

OpenStudy (anonymous):

-2 and 1

OpenStudy (anonymous):

Yay so it really is D

Directrix (directrix):

G (-1, -1) --> G' (-2, 1) Correct.

OpenStudy (anonymous):

yes ur the best help ever

Directrix (directrix):

Thanks.

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