Question

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

Answer 1

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

Answer 2

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

Answer 3

still don't get it

Answer 4

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

Answer 5

yeah i did that and i go 180

Answer 6

@boldjon

Answer 7

i'm right?

Answer 8

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.

Answer 9

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

Answer 10

it's c thanks for the help people

Answer 11

i think its 90 ..