PROVING THEOREMS ON THE DIFFERENT KINDS OF PARALLELOGRAM OBJECTIVES: •Prove Theorems On The Different Kinds Of Parallelogram PRE-TEST PRE-TEST PRE-TEST PRE-TEST RECTANGLE PROBE CPCTC • CPCTC stands for "corresponding parts of congruent triangles are congruent" and tells us if two or more triangles are congruent, then their corresponding angles and sides are congruent as well.