Read all the angles formed by the lines v w and x y.
Read all the angles above the line n p.
Below the line n p. Above the line q r.
At the right of the line 5 u.
At the left. At the right of the line s t.
At the left of the line s t.
Which angle is the greater, n 1 3, or n 2 4?
If the lines x y and v w were lengthened or produced, would the angles v z x, y z w be any greater?
If they were shortened, would the angles be any less?
What is an angle?