Name another trapezoid.
Why is Fig. 6 a trapezoid?
How many pairs of parallel sides has the quadrilateral i l?
Name the horizontal parallels.
Name the oblique parallels.
It is called a “parallelogram.”
A parallelogram is a quadrilateral whose opposite sides are parallel.
Name five other parallelograms.
Why is Fig. 4 a parallelogram?
Why is not Fig. 6 a parallelogram?