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Mathematics 19 Online
220287:

ΔABC is reflected across the x-axis and then translated 4 units up to create ΔA′B′C′. What are the coordinates of the vertices of ΔA′B′C′ ? https://cdn.ple.platoweb.com/EdAssets/7dc099f3e5a541b8b51abd82ec3898db?ts=635296001306730000 A. A′(-3, 3), B′(-1, 1), C′(-2, 3) B. A′(3, -3), B′(1, -1), C′(2, -3) C. A′(3, -5), B′(1, -7), C′(3, -5) D. A′(-3, 3), B′(-1, 1), C′(-2, -3)

220287:

@HuskyNation @Marziman @Elsa213 @joshiscool

Bob:

k let's do point B first

Bob:

left one and 3 up is what ?

Bob:

oh wait

Bob:

without translating it, B is (-1, 3), C is (-2, 1), and A is (-3, 1)

Bob:

moving the triangle 4 units up will change the y-values, but the x-values will remain the same.

Bob:

oh wait, it says reflected... i'm bad at math xD

celticcat:

the reflection in x axis wiil give the points A = (-3,-1) so A' will have coods (-3,3) C' will be (-2,3)

celticcat:

B' will be (-1,1) so A is the answer

220287:

TY

Allison:

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