Von makes a design with four lines. At least two of them are parallel. He says that his design shows vertical angles,
corresponding angles, alternate interior angles, and linear
pairs of angles.
Draw a diagram of Von's design. Label the lines a, b, c, and d,
and label the angles formed by the lines 1, 2, 3, 4, and so on.
Describe how the lines are related List all of the angles that
are congruent to 21 in your diagram. Then list all of the
angles that are congruent to 22.
Name one pair of angles in your diagram to illustrate each
angle relationship mentioned in Von's description. Tell how
you know that the angles illustrate the relationship.