Question

help me with this
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The vertices of triangle IJK have coordinates I(−5, −2), J(−5, −4), and K(−4, −4).

Which coordinates are the coordinates of the vertices of triangle IꞌJꞌKꞌ when triangle IJK is rotated 180° clockwise around the origin?

A.
Iꞌ(5, 2), Jꞌ(5, 4), Kꞌ(4, 4)

B.
Iꞌ(−2, 5), Jꞌ(−4, 5), Kꞌ(−4, 4)

C.
Iꞌ(2, −5), Jꞌ(4, −5), Kꞌ(4, −4)

D.
Iꞌ(−5, 2), Jꞌ(−5, 4), Kꞌ(−4, 4)

Answer 1

@amistre64 @fallenangelorchid @mathstudent55 @bohotness

Answer 2

okay what do you hink is your answer love

Answer 3

i think its b

Answer 4

okay why?

Answer 5

if O is origin .....let P (x , y) with respect to axes OX and OY.....and let P(x' , y') with respect to axes OX' and OY' where angle X'OX = angle Y'OY =
θ

then
x' = x cos(theta) + y sin(theta)
y' = -x sin(theta) + y cos(theta)

Answer 6

x' = -5 cos(180) + (-2) sin(180)
y' = 5 sin(180) + (-2) cos(180)

Answer 7

oay

Answer 8

thats all i know XD

Answer 9

see i
if O is origin .....let P (x , y) with respect to axes OX and OY.....and let P(x' , y') with respect to axes OX' and OY' where angle X'OX = angle Y'OY = [Math Processing Error]
then
x' = x cos(theta) + y sin(theta)
y' = -x sin(theta) + y cos(theta)

Answer 10

u got the angle theta = 180 degrees....
so just plug the values

Answer 11

like for I
I' (x' , y')
x' = -5 cos(180) + (-2) sin(180)
y' = 5 sin(180) + (-2) cos(180)

Answer 12

http://assets.openstudy.com/updates/attachments/5506e4cbe4b05989c3dfb37e-rishavraj-1426517647864-screenshot_1.png

Answer 13

http://assets.openstudy.com/updates/attachments/5506e4cbe4b05989c3dfb37e-rishavraj-1426518002494-screenshot_2.png

Answer 14

D?? :)

Answer 15

does that information i give you sound like d?

Answer 16

okay love, calm down. C?

Answer 17

@bohotness

Answer 18

@cutiemarklove

Answer 19

i would say it was D

Answer 20

"_\\:)

Answer 21

thanks dudeee

Answer 22

^~^