Determine if the expression 7r – 693 — 10r4 is a polynomial or not. If it is a polynomial, state the type and degree of the polynomial.

Set square i think so

“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 .