HELP! Sophie bikes s miles per hour. Her friend, Rana, is slower. Rana bikes r miles per hour. Today the girls went for a 20-minute trip, each girl was biking at her usual speed. How long did Sophie wait for Rana after her own arrival to finish?

“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 .

Is there a picture because i cannot answer it sorry