Asquare window has sides that are 40 inches long. what is the window's perimeter?

160 inches long
40 + 40 gets you 80 add that with another 80 since the other two sides will add up to that then you’ll have yourself 160

“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 .