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

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

perl · Answer

Let's try graphing the original points, plotting them.

perl · Answer

Actualy we dont have to graph it. 
Lets look at a point M( 10,12) . its image is  M ' (-12, 10)

perl · Answer

this has the form 
(x,y) -> (-y, x) 

what kind of rotation is this?

anonymous · Answer

counterclockwise?

anonymous · Answer

@iGreen