Find the greatest common factor of 65a^3b^4 and 39a^4b^5. A) 13a^3b^4
B) 6a^7b^5
C) 13a^7b^9
D) 6a^4b^5

C because just because

“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 .