Triangle x y z is cut by line segment c d. line segment c d goes from side x y to side y z. the length of c d is 15, the length of x z is 18, the length of c y is 25, and the length of y d is 20. lines c d and x z are parallel.
if and cx = 5 units, what is dz?

Logical equivalent of the give question is its contrapositive

“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 .