please answer these questions. they are for my geometry hw and i am having difficulty understanding them. Thanks! also for #3, the point that is cut off all the way at the right is D. for #4, the bottom three points starting from the left is C, Y, and B

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .

The solution to the system of equations (-2,2)