What is the difference between congruent and similar?
Congruent figures have the same distances and angle measures (identical figures) while similar figures have just the same angle measures (dilated figures).
What is the longest chord in a circle?
Diameter (a chord that goes through the center).
What is Cavalieri's Principle?
If two 3D figures have the same height and the same cross-sectional area at every point along the height, then they have the same volume.
What "mode" do I need to set my calculator to as soon as I sit down for my exam?
Degree mode!
When do I use regular trigonometry functions (SOHCAHTOA) and when do I use inverse trigonometry functions?
Regular trig functions when I am solving for a missing side length and inverse trig functions when I am solving for a missing angle.