Question

thermosets are good to use when printing objects that need to have smooth surfaces or dimensional accuracy.
if part of your design needs to be held up, while using thermosets to create an object, you can print support structures at the same time. if you are wanting a really smooth surface with fine details, it is a good idea to keep that side facing up and away from the support structures.
when printing with thermosets, what should you do when part of your design needs extra support?
nothing, your object can just float in the resin
change your design to be completely square
print support structures

Explanation:

The text on the left side of the image clearly states that when part of a design needs to be held up while using thermosets, one can print support structures. This directly answers the question on the right side.

Answer:

print support structures