Lines e and f are parallel. The mAngle9 = 80° and mAngle5 = 55°. Which angle measures are correct? Select three options.

The first one minimumi hope my answer you.

“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 .