The coordinates of the vertices of figure MNOP are M(10, 12), N(23, 16), O(12, 17), and P(11, 25). Figure MNOP was rotated around the origin to produce figure MꞌNꞌOꞌPꞌ with vertices Mꞌ(12, −10), Nꞌ(16, −23), Oꞌ(17, −12), and Pꞌ(25, −11).

What was the degree of rotation?

° clockwise
Would appreciate some help on this, I do not fully understand.

Question

The coordinates of the vertices of figure MNOP are M(10, 12), N(23, 16), O(12, 17), and P(11, 25). Figure MNOP was rotated around the origin to produce figure MꞌNꞌOꞌPꞌ with vertices Mꞌ(12, −10), Nꞌ(16, −23), Oꞌ(17, −12), and Pꞌ(25, −11).
 
What was the degree of rotation?
 
  ° clockwise
Would appreciate some help on this, I do not fully understand.

genericnoodles · Answer

@iGreen thoughts on this?

genericnoodles · Answer

@133 :D

133 · Answer

Sorry I can't help right now but maybe these people can 
@Agl202 @Data_LG2 @HackberryAbby18 @iYuko @Michele_Laino @MikeyMaximum  
@paki @shifuyanli

133 · Answer

@Love_Ranaa @bgrundstrom

anonymous · Answer

im just going to say I dont understand sorry

anonymous · Answer

Uh whats u need help wit?

genericnoodles · Answer

Its a bit of a tough one xD

agl202 · Answer

Changes in a coordinate (x,\ y) can be observed with 90 degree rotations about the origin.

90 degrees CW = (y,\ -x)
180 degrees CW = (-x,\ -y)
270 degrees CW = (-y,\ x)

Let's observe M(10, 12) and M'(12, -10).
Since they switched and the x value became negative,
 it must have been a 90 degree rotation.

genericnoodles · Answer

Thank you! I've been stuck on this for so long cx

agl202 · Answer

Anytime... Tag me when u need help!

genericnoodles · Answer

Thanks for tagging them :) @133

133 · Answer

No problem!!:)