Question

Find the coordinates of the image of a triangle with vertices : A(0,-4), B(9,0), and C(-5,2) for a rotation of 90 degrees counterclockwise about the origin.

Answer 1

swap x for y and negate

Answer 2

A(4,0), B(0.9), C(-2,-5)

Answer 3

(0,-4) = (--4,0)

(9,0) = (0,-9)

(-5,2) = (-2,--5)

Answer 4

c might be off, -5,2 is down 5 and right 2; 2,-5

Answer 5

amistre, is "swap x and y and negate" the general method?

Answer 6

how can it be (0, -9) ??

Answer 7

im thinking it is general in me head

Answer 8

ok i understand that thank you!!

Answer 9

might need to be tweeked with quadrants tho :)

Answer 10

(9,0) would be (-0,9)

Answer 11

so yeah, it works for me :) as long as i dont typo meself lol

Answer 12

amistre when u get a sec jump on mine for me?