Kate has 79 more envelopes to stamp before she can send off her wedding invitations. If she is sending 34 invitations in all, how many has she stamped so far?

“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 .