Explain why a counter with an upper limit of five(101) resets at six (110)

Because the preconfiguration set 5 (101) as the upper limit.

Before going to a higher number than 5 which next is 6(110)  or beyond the upper limit, It resets.

“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 .