What are the dimensions of this matrix?
example: 2 x 2

You have 3 rows, and 3 columns so
rows x columns=3 x 3

“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 .