Geometry

Question Analysis:
This question focuses on using the slope formula in coordinate geometry to find the slope of a side of a triangle.
The main focus is correctly substituting the coordinates of the two endpoints of the side into the slope formula.

Key Concept Explanation:
The slope formula for a line segment with endpoints and is .
It measures the steepness of the line segment connecting the two points.

Step - by - Step Solution:
1. Identify the coordinates of points and :
   - For point , , . For point

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