please check
https://www.dropbox.com/s/cslyquhc6wgjnoe/Screenshot%202016-01-31%2013.21.49.png?dl=0

Question

please check 
https://www.dropbox.com/s/cslyquhc6wgjnoe/Screenshot%202016-01-31%2013.21.49.png?dl=0

mathmale · Answer

I think sketching the original and the transformed triangles will pretty much tell you the correct answer.

faiqraees · Answer

@mathmale pretty much right. Graphing is the most easiest way to figure it out

boldjon · Answer

still don't get it

faiqraees · Answer

Sketch the triangles on the graph then use intuition to figure out the angle required to rotate

boldjon · Answer

yeah i did that and i go 180

rocketisawesome · Answer

@boldjon

boldjon · Answer

i'm right?

mathmale · Answer

Bold Jon:  I'm still waiting to see your sketch.
To help you get started, I'll sketch the first triangle.  You'll need to sketch the 2nd one.|dw:1454266225538:dw|

mathmale · Answer

Edit my graph.  Sketch the 2nd triangle right on top of the first one.

boldjon · Answer

it's c thanks for the help people

anonymous · Answer

i think its 90 ..