Question
How many lines are 
  1. perpendicular to LM? 
  2. parallel to QR? 
  3. perpendicular to ST?
2 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

(c)

Click button first when a symbol is required. X

How many lines are 
  1. perpendicular to LM? 
  2. parallel to QR? 
  3. perpendicular to ST?