Find the coordinates of the image of a triangle with vertices A(0, –5), B(–9, 0), and C(–6, 2) under a rotation of 90 degree clockwise about the origin.

A. A'(0,-5) B'(9,0) C'(6,2)

B. A'(5,0) B'(9,0) C'(-2,-6)

C. A'(0,5) B'(9.0) C'(-6,2)

D. A'(-5,0) B'(0,9) C'(2,6)

Question

Find the coordinates of the image of a triangle with vertices A(0, –5), B(–9, 0), and C(–6, 2) under a rotation of 90 degree clockwise about the origin.

A.	A'(0,-5) B'(9,0) C'(6,2) 

 B.	A'(5,0)  B'(9,0) C'(-2,-6)
 
 C.	A'(0,5)  B'(9.0) C'(-6,2)
 
 D.	A'(-5,0) B'(0,9) C'(2,6)

anonymous · Answer

By the way I WILL GIVE MEDAL!

marigirl · Answer

do u have any info about the origin. does it specify where it is? or are we assuming its in the middle of the triangle?

anonymous · Answer

No all it says is that :(

marigirl · Answer

omg im so stupid. origin means (0,0)

anonymous · Answer

Thanks ! :)

marigirl · Answer

okay lets work through the first one
can u see my attachment

marigirl · Answer

I hope you can see my attachment. I normally have a discussion with the person posting the question rather than TELLING u the answer, but i gotta go now. so i shall just TELL you. haha

See Attachment

A: well the triangle has not been rotated about the origin (0,0) so its out.
B and C doesnt even look like the original triangle i thinl
D looks the best to me which has been rotated 90 degrees clockwise about point (0,0). please ask question to clarify further if you wish

anonymous · Answer

Thank you i saw the attachtment

marigirl · Answer

does it make sense?