L3.11 - Splitting Triangle Sides with Dilation, Part 2
Learning Intentions and Success Criteria
We are learning to:
- Prove that a segment parallel to one side of a triangle divides the other sides proportionally (in writing).
- Explain why a segment parallel to one side of a triangle divides the other sides proportionally.
11.1: Notice and Wonder: Parallel Segments
What do you notice? What do you wonder?
11.2: Prove It: Parallel Segments
Does a line parallel to one side of a triangle always create similar triangles?
1. Create several examples. Decide if the conjecture is true or false. If it’s false, make a more specific true conjecture.
2. Find any additional information you can be sure is true. Label it on the diagram.
3. Write an argument that would convince a skeptic that your conjecture is true.
11.3: Preponderance of Proportional Relationships
Learning Intentions and Success Criteria
We are learning to:
- Prove that a segment parallel to one side of a triangle divides the other sides proportionally (in writing).
- Explain why a segment parallel to one side of a triangle divides the other sides proportionally.
1.
2.
