Susan has a pencil that is 3 centimeters shorter than this string. how long is the pencil.

I need more information about the string.

“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 .

That’d be 9 years or something