**Parallel Lines And Proportional Parts Worksheet** – Alternate interior angles are congruent if the lines are parallel. Corresponding angles are congruent if the lines are parallel

If a line parallel to one side of a triangle passes through the other two sides, it divides the other two sides proportionally. (This ratio is not a scaling factor in triangles) The sides where a parallel line intersects create 2 segments on each side, these 4 segments are proportional. Assume that the line is parallel to the base of the triangle.

## Parallel Lines And Proportional Parts Worksheet

4 Transformations If the segments are proportional, then the lines are parallel. You should know these assumptions inside and out.

#### Proportional Segments Between Parallel Lines

If two or more lines pass through two sides of a triangle parallel to the third side, then they divide both sides proportionally. This simply means that you can adjust multiple aspect ratios depending on the sections you use on one side of the form.

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