Interactive Triangle Classifier
About This MicroSim
This interactive tool allows you to create and classify triangles by dragging vertices. The classification updates in real-time as you move the vertices.
How to Use
- Drag vertices A, B, or C to change the triangle shape
- Watch the classification update automatically
- Use Reset to return to the default triangle
- Use Random to generate a random triangle
- Toggle Grid and Measurements display
Classification System
By Sides
| Type | Definition |
|---|---|
| Scalene | All three sides different |
| Isosceles | Two sides equal |
| Equilateral | All three sides equal |
By Angles
| Type | Definition | Color |
|---|---|---|
| Acute | All angles < 90° | Purple |
| Right | One angle = 90° | Red |
| Obtuse | One angle > 90° | Teal |
Visual Markers
- Tick marks indicate equal sides (congruent)
- Right angle square marks 90° angles
- Color indicates angle classification
Key Facts
- Every triangle has exactly ONE classification by sides AND ONE by angles
- Equilateral triangles are always acute
- A triangle can be "isosceles and right" or "scalene and obtuse"
Learning Objectives
- Understand the dual classification system for triangles
- Apply classification rules to various triangles
- Analyze how changing vertices affects classification
Bloom's Taxonomy Level
Understanding, Applying, and Analyzing
Iframe Embed Code
<iframe src="https://dmccreary.github.io/geometry-course/sims/triangle-classifier/main.html"
height="602px"
width="100%"
scrolling="no"></iframe>