Because their opposite sides are parallel, what may each be called?
In what respect do they differ?
What particular name may be given to Fig. C?
What one to Fig. D?
What three names may you give to the figure with right angles?
What three to the one without right angles?
RHOMBOID AND RHOMBUS.
In what three things are Figs. E and F alike?
What three names may be given to each?
How do they differ from each other?