Has the parallelogram a d any right angle?

It is called a “rhomboid.”

A rhomboid is a parallelogram which has no right angle.

Name five other rhomboids.

What three names may be given to Fig. 2?

Why is it a quadrilateral?

Why a parallelogram? Why a rhomboid?

RHOMBS.

Are the four sides of the rhomboid a d equal to each other?

Are the four sides of the rhomboid e h equal to each other?