Question

I don't understand, I need help? please someone

Answer 1

It means to turn the SEA triangle 270' around the (0,0) point of the graph.

Explanation:

One easy way to do this to learn the concept is to draw a copy of the SEA triangle with the same units on a separate piece of paper. Cut it out and overlay it on the original picture.

Then take a protractor and line it up with the x-axis, with the "center" at (0,0). Now you can rotate the cut-out triangle `270^o` (`3/4` of a full circle turn) around the origin" by holding it fixed to the protractor as you rotate it around the origin and see how it ends up.

You can also simply rotate the entire original graph, but then you need to go back and adjust the number values on the coordinates.