Geometry

Question Analysis:
This question checks understanding of full proof tools for a parallelogram.
The main focus is on combining multiple formulas.

Key Concept Explanation:
Parallelograms need both parallel sides (slope) and congruent sides (distance).

Step-by-Step Solution:
Use slope to check parallelism; distance to check congruence.

Option Analysis:
A. Slope is not enough alone.
B. Distance alone misses parallelism.
C. Correc...