Reflection: Developing a Conceptual Understanding Properties of Isosceles Triangles - Section 1: Do Now


I have created two versions of this lesson, of which I usually teach only one. See Properties of Isosceles Triangles Alternative Lesson with Dynamic Geometry Software for the alternative version. With ever increasing access to technology it might be possible to use the alternative lesson as a blended learning version, or to combine the two lessons. Let me know if you choose to do anything with these lessons.

  For a more hands-on version of this lesson...
  Developing a Conceptual Understanding: For a more hands-on version of this lesson...
Loading resource...

Properties of Isosceles Triangles

Unit 7: Proofs about Triangles
Lesson 10 of 11

Objective: SWBAT write two-column proofs involving the properties of isosceles triangles.

Big Idea: Students will create a graphic organizer with the properties of isosceles triangles in order to write proofs.

  Print Lesson
Add this lesson to your favorites
Math, Geometry, Isosceles triangle, formal proof, Triangle Proofs
  45 minutes
properties of isosceles triangles image
Similar Lessons
Applying Triangle Congruence
Geometry » Triangles and Congruence
Big Idea: Students learn how proving triangles congruent can be used as part of a larger strategy in a proof.
Ault, CO
Environment: Rural
Tom Chandler
Time for Triangles
Geometry » Tremendous Triangles
Big Idea: Students will measure, cut and measure again to learn and prove key properties of triangles
Saratoga Springs, NY
Environment: Suburban
Stephanie Conklin
Prove It (Part 1)
Geometry » Similar and Right Triangles
Big Idea: Students work on proving hypotheses – and end up proving the Pythagorean Theorem.
Amsterdam, NY
Environment: Urban
Beth Menzie
Something went wrong. See details for more info
Nothing to upload