Q3, W1: January 4 – 7 Geometry

MAFS.912.G-SRT.2.4: Prove theorems about triangles. (Theorems include: Triangle Proportionality Theorem or Side Splitter Theorem – a line parallel to one side of a triangle divides the other two proportionally.)

MAFS.912.G-SRT.2.5: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

• apply theorems, postulates, or definitions to prove theorems about triangles and proportional parts of parallel lines, including:
  1. Triangle Proportionality Theorem- A line parallel to one side of a triangle divides the other two proportionally.
  2. Converse of Proportionality Theorem- If a line divides two sides of a triangle proportionally, then it is parallel to the third side
  3. Triangle Midsegment Theorem (side splitter theorem as applied to triangle) – a midsegment of a triangle is parallel to one side of a triangle and its length is one-half the length of that side.
• use triangle similarity to solve problems
• use triangle similarity to prove relationships in geometric figures.

Tuesday:

1. Students will choose cartoon and set up Dilations Project
2. Students will then do IXL P.5

Wednesday:

1. Students will take notes on Parts of Similar Triangles and Triangle Angle Bisector Theorem
2. Students will do the practice problems

Thursday/Friday:

1. Students will do guided notes on Triangle Proportionality Theorem and Parallel Lines and Proportional Parts.
2. Students will do the homework practice sheets.
3. Students will finish up the IXL’s.

• Practice sheet on Triangle Proportionality Theorem.
• IXL P.5

All IEP and ESOL accomodations are provided daily.