Geometry

Question Analysis:
This question focuses on proving rectangle properties in coordinate proofs.
The main focus is verifying right angles through slopes.

Key Concept Explanation:
A rectangle is a parallelogram with four right angles.
Perpendicular adjacent sides confirm the presence of right angles.

Step-by-Step Solution:
Find slope of AB and BC.
Slopes should be negative reciprocals if sides are perpendicular.
slope of AB = 0,  slope of BC is undefined → they are perpendicular.

Option Analysis:
A. All sides congruent proves a rhombus, not necessarily a rectangle.
B. Correct. P...