Posted by Tessa on .
What type of quadrilateral is formed by connecting the points (0,0), (3x,b), (18x,b), and (15x,0)? Explain.
How would I solve this?

geometry 
MathMate,
Isabelle,
your earlier question has been answered:
http://www.jiskha.com/display.cgi?id=1403640676