Answer:
I have never actually seen a zigzag ruler, but I would assume to make zigzag lines.
Explanation:
Answer: C- Engraving
Explanation: accomplished by pushing small v-shaped metal rod called a burin, across a metal plate, usually of copper or zinc, forcing the metal up and off the plate in slivers. Line engravings were commonly used to illustrate books and reproduce works of art in the era before photography.
