The mid point of a line segment AB is (5,7). If the coordinates of A( -1,5), what is the coordinates of B? (Sorry if it’s worded a little weird but that’s how my teacher wrote it.)

“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 .