A triangle with vertices at (0, 4), (3, 5), and (2,-1) is rotated 90 degrees counterclockwise about the origin. what are the vertices of the image?

A. (4, 0), (5,3), and (1,2)
B. (-4, 0), (-5, 3), and (1, 2)
c. (0, 4), (-3, -5), and (-2, 1)
D. (0, -4), (-3, -5), and (-2, 1)

Question

A triangle with vertices at (0, 4), (3, 5), and (2,-1) is rotated 90 degrees counterclockwise about the origin. what are the vertices of the image?

A. (4, 0), (5,3), and (1,2)
B. (-4, 0), (-5, 3), and (1, 2)
c. (0, 4), (-3, -5), and (-2, 1)
D. (0, -4), (-3, -5), and (-2, 1)

anonymous · Answer

lets say you have (x,y) after you rotate it 90 degrees counterclockwise it would be (-y,x)

anonymous · Answer

so u flip x and y which means you're left with a or b

anonymous · Answer

and because the y value turns negative u would be left with B

anonymous · Answer

does that make sense

anonymous · Answer

yeah

anonymous · Answer

anything else u need help with ?

anonymous · Answer

hold lemme check...

anonymous · Answer

would you help me with this one?

anonymous · Answer

@israa88

anonymous · Answer

sure give me a sec

anonymous · Answer

i got B hold on let me show u my work

anonymous · Answer

|dw:1430609647648:dw|

anonymous · Answer

alright thanks super much!!!!

anonymous · Answer

Your super welcome :) lol anytime