Theorem 12 - Two Sides of a Triangle cut by a line Parallel
- Author:
- SeamusMcCabe
This demonstrates that a line drawn parallel to one side of a triangle divides the other two sides in the same ratio.
Drag one of the vertices of the triangle. The lengths change but the ratio on each side of the triangle does not.
Drag the point D up or down. This time the ratios change but they are always equal.