# A line segment with endpoints at #(-1 , 2 )# and #(-4, 1 )# is rotated clockwise by #pi #. What are the new endpoints of the line segment?

##### 1 Answer

Jan 26, 2016

#### Answer:

(-1, 2) ==> (1, -2)

(-4, 1) ==> (4, -1)

Something to note- Rotation by

#### Explanation:

use the rotation transformation matrix

Where

Now (-1, 2, 0):

So (1, 2, 0)

and using the same (4, -1, 0)