## Reflection: Adjustments to Practice Properties of Isosceles Triangles Alternative Lesson with Dynamic Geometry Software - Section 1: Do Now

In this lesson, students investigate the properties of isosceles triangles using Geometer's Sketchpad. The focus of the lesson is on discovering the properties. Students refer back to this lesson in later lessons and use their graphic organizers to write proofs.

In a typical year I use either this lesson or Properties of Isosceles Triangles depending on the level and learning styles of my students. This lesson is more hands on and is helpful for students who lack prior knowledge about the properties of isosceles triangles or who benefit from the visual evidence provided by a dynamic sketch.

# Properties of Isosceles Triangles Alternative Lesson with Dynamic Geometry Software

Lesson 11 of 11

## Big Idea: Students will use Geometer's Sketchpad to discover properties of isosceles triangles, which they will use to create a graphic organizer and to write proofs.

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1 teacher likes this lesson
Standards:
Subject(s):
Math, Geometry, Isosceles triangle
45 minutes

### Marisa Laks

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