### Home > GC > Chapter 7 > Lesson 7.3.3 > Problem 7-121

7-121.

MUST BE / COULD BE

Here are some more challenges from Mr. Quincey. For each description of a quadrilateral below, say what special type the quadrilateral

*must be*and/or what special type the quadrilateral*could be*. Look out: Some descriptions may have no “must be”s, and some descriptions may have many “could be”s! Homework Help ✎“My quadrilateral has two right angles.”

“The diagonals of my quadrilateral are perpendicular.”

Try drawing shapes that would fit the descriptions Mr. Quincey gives in parts (a) and (b).

must be: none

could be: trapezoid, rectangle, or square

There are no ''must be''s for part (b) either.