ok i have vertex A=(0,-5), B=(1,9)C=(8,9) and D=(-3,-1), what would the coordinates for each vertex be after is is rotated 90 degree about the origin,,
help is really appreciated, thanks.
2006-11-24 14:04:18 · 5 answers · asked by BLUEEEE 1 in Science & Mathematics ➔ Mathematics
sry, clockwise would be okay.
2006-11-24 14:08:58 · update #1
+90° rotation (ie 90° anticlockwise)
A = (0, -5) → (-5, 0)
B = (1, 9) → (-9, 1)
C = (8, 9) → (-9, 8)
D = (-3, -1) → (1, -3)
-90° rotation (ie 90° clockwise)
A = (0, -5) → (5, 0)
B = (1, 9) → (9, -1)
C = (8, 9) → (9, -8)
D = (-3, -1) → (-1, 3)
2006-11-24 14:12:38 · answer #1 · answered by Wal C 6 · 0⤊ 1⤋
Rotating 1/4 turn clockwise will move the point (x,y) to the point
(y, -x). Try it graphically, for example start with (3,1) in the first quadrant. The first quarter-turn will move it to (1,-3)... another quarter-turn will take it to (-3,-1)... then to (-1, 3)... and back to (3,1).
2006-11-24 14:16:52 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Is it rotated clockwise 90 degrees or counterclockwise?
If it is rotated clockwise, use the formulas xnew = yold, ynew = -xold.
If it is rotated counterclockwise, xnew = -yold, ynew = xold.
2006-11-24 14:10:33 · answer #3 · answered by Jim Burnell 6 · 0⤊ 0⤋
Need to know which direction of rotation.
2006-11-24 14:06:49 · answer #4 · answered by Sophist 7 · 0⤊ 0⤋
that -5 wit a pie im a sixed grader and i now it
2006-11-24 14:09:05 · answer #5 · answered by Helen C 1 · 0⤊ 0⤋