- Check each quilt square.
- Is the postulate represented?
- Is the note card clearly written?
- Is the report on quilt making clearly written?
- Provide feedback as needed.
Proof Using SAS and HL
I.SectionObjectives
- Understand and apply the SAS Congruence Postulate.
- Identify the distinct characteristics and properties of right triangles.
- Understand and apply the HL Congruence Theorem.
- Understand that SSA does not necessarily prove triangles are congruent.
II.Cross-curricular-Quiltmaking
- Students are working on adding on to their quilts.
- In this lesson, they are going to be creating quilt squares using right triangles.
- After the student has created his/her square, ask them to create a color card to demonstrate congruence using
the SAS Congruence Postulate. - These quilt squares should contain right triangles.
- Add these quilt squares to the poster.
- Students can also sew these to the quilt.
III.TechnologyIntegration
- Ask students to look at patterns using right triangles.
- Then have them find quilt patterns using right triangles.
- This investigation can impact their design work on the quilt squares.
- Have students look at some examples of Amish Quilts.
- How do they differ from other quilt designs?
- Ask the students to identify some of their favorite patterns and explain why they were selected.
IV.NotesonAssessment
- Examine student work.
- Is the student caught up on the work on the quilt?
- Is each square in today’s lesson using right triangles?
- Does the student understand the SAS Congruence Postulate?
- Is this clearly demonstrated on the color card?
- Provide students with feedback/coaching as needed.
Using Congruent Triangles
I.SectionObjectives
3.4. Congruent Triangles