Prove that the line joining the mid-points of the two sides of a triangle is parallel to the third side.

Explanation

To prove that the line joining the midpoints of two sides of a triangle is parallel to the third side, we can follow these steps:

### Step 1: Define the Triangle and Midpoints
Let triangle ABC have vertices A, B, and C with coordinates:
- A (x₁, y₁)
- B (x₂, y₂)
- C (x₃, y₃)

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