Asecant line contains a chord. always sometimes never

These question are hard can you me with answers

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related