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Geometry 11 Online
OpenStudy (anonymous):

Pentagon ABCDE and pentagon A'B'C'D'E' are shown on the coordinate plane below.

OpenStudy (anonymous):

OpenStudy (anonymous):

Which two transformations are applied to pentagon ABCDE to create A'B'C'D'E'?

OpenStudy (anonymous):

Select one: a. translated according to the rule (x, y) →(x + 8, y + 2) and reflected across the y-axis b. translated according to the rule (x, y) →(x + 2, y + 8) and reflected across the x-axis c. translated according to the rule (x, y) →(x + 2, y + 8) and reflected across the y-axis d. translated according to the rule (x, y) →(x + 8, y + 2) and reflected across the x-axis

OpenStudy (anonymous):

@AllTehMaffs

OpenStudy (anonymous):

Take a look at which axis it was reflected across. You can get rid of two choices right away. :D

OpenStudy (anonymous):

its kind-of confusing to find that out because it looks like its in between if you know what i mean

OpenStudy (anonymous):

Well, that's because of the translation that happened after. Look at which point corresponds to which point. It's clearly flipped one direction and not the other.

OpenStudy (anonymous):

The translation happens before the flip...

OpenStudy (anonymous):

Oh, yes. Translated first! But the rest of it is still valid..

OpenStudy (anonymous):

True! :)

OpenStudy (anonymous):

hmm...

OpenStudy (anonymous):

Imagine a little mirror sitting on each axis. Which mirror shows what you get? If you have a small mirror you could actually even do that.

OpenStudy (anonymous):

Take your left hand with your palm pointing to you, and "rotate it over the y-axis" of your forearm so you see the back of your hand; your thumb will be pointing to the right. Just like the little pointy C bit

OpenStudy (anonymous):

So we can get rid of B and D

OpenStudy (anonymous):

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