Answer:
Wedges and dashes are used to indicate the three dimensional shape in a drawn structure.
A wedge indicates that the atom or group is GOING OUT of the page.
Step-by-step explanation:
wedges and dashes are ways or drawings use to represent three dimensional shape in a structure. Lines are use to represent image in the structure. A wedge line shows that molecules or bonds are moving towards the viewer i.e out of the the page.
A dashes line shows that bonds or atom are moving away the viewer or going into the group.