1. 7-4 Parallel Lines and Proportional Parts
Vocab:
Midsegment of a triangle: a segment with endpoints that are the midpoints of 2 sides of a triangle. The midsegment is half the length of the side.
Theorem:
Triangle Proportionality Theorem: If 𝑋𝑌 ∥ 𝑅𝑆 , then 𝑅𝑋 𝑋𝑇 = 𝑆𝑌 𝑌𝑇

2. Find the length of a side
Ex 1: In △ABC, 𝐸𝐹 ∥ 𝐶𝐵 . Find x.
Ex 2: Find x.

3. Determine if lines are parallel
Ex 3: In △GHJ, HK = 5, KG = 10, JL = 6 and LG = 12. Is 𝐻𝐾 ∥ 𝐾𝐿 ?

4. Proportional Parts
Ex 4: Solve for x and y
Ex 5: Solve for x

5. Classwork/Homework
P even