Texas Math Models

Parallel sides

present or absent

G3–4

Do two sides run the same way forever without ever meeting?PARALLEL SIDESparallelogram2 pairstrapezoid1 pairNO PARALLEL SIDESquadrilateral0 pairstrianglenever anythe amber sides are the parallel onesthree sides cannot make a pairparallel is about a PAIR of sides, so one side alone is never parallel

How this one works

How

look for two sides that would never meet, however far you ran them.

Best when

you are telling quadrilaterals apart from each other.

The same problem, other ways