Solving for Sides with the Side-Splitter Theorem
Learning Objective
I can use the Side-Splitter Theorem to solve for unknown side lengths in triangles.
Lesson Flow
Watch Video
The Triangle Midsegment Theorem
Professor Dave Explains
Guided Notes
Key concepts students will learn:
- •
A midsegment connects the midpoints of two sides of a triangle; therefore, every triangle has three midsegments.
- •
The Triangle Midsegment Theorem states that a midsegment is parallel to one side of the triangle and half the length of that side.
- •
If a side of a triangle is split into two equal sections, the midsegment parallel to that side is equal in length to one of those sections.
Practice
11 questions • Multiple choice & Short answer
Exit Ticket
“Triangle ABC has midsegment DE, where D is the midpoint of AB and E is the midpoint of AC. If BC = 18, what is the length of DE?”
Teacher Guide
Get the complete package:
- Answer keys for all questions
- Differentiation strategies
- Extension activities
- Printable student handouts
