Classifying Triangles Task Cards: Printable and Digital

Grade Levels
4th - 6th
Resource Type
Formats Included
  • PDF
  • Google Apps™
14 pages
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Includes Google Apps™
The Teacher-Author indicated this resource includes assets from Google Workspace (e.g. docs, slides, etc.).


These Classifying Triangles task cards are the perfect way to practice different types of triangles before learning the triangle hierarchy. It is the perfect addition to a geometry unit on classifying 2-D shapes.

This triangle product covers the following topics:

  1. Classifying Triangles According to their Sides: Scalene, Isosceles, Equilateral
  2. Classifying Triangles According to their Angles: Right, Obtuse, Acute

  • Includes printable and digital task cards
  • This resource uses Google Forms and allows students to work through 24 digital task cards. The best part? Once they submit the assignment, it will be graded automatically!
  • If you are using Google Classroom™, you can import the grades automatically or look at the spreadsheet.

These task cards can be used for enrichment with fourth graders, or as an assessment tool with fifth graders. It's a great addition to your geometry unit!

Common Core Aligned: 4.G.A.2; 5.G.B.3

Do you teach about Classifying Polygons? Here are some other resources:

  1. PowerPoint Lesson: 177 Slides broken into 6 different lessons
  2. 5th Grade Geometry Standards Interactive Notebook
  3. Classifying Polygons Worksheets
  4. Quadrilateral Discovery Activity: FREE!
  5. Quadrilateral and Triangle Hierarchy Reference Sheet
  6. Geometry Vocabulary Reference Sheet
  7. 2-Dimensional Figures Task Cards: Print and Digital
  8. Polygon Hierarchies Sort: Print and Digital
  9. Geometry "Guess it" Game
  10. Small Group Sort Cards
  11. Classifying Polygons Unit Test OR Study Guide

✔ Save $$: Classifying Polygons, Quadrilaterals, and Triangles Unit

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Total Pages
14 pages
Answer Key
Teaching Duration
30 minutes
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to see state-specific standards (only available in the US).
Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.
Understand that attributes belonging to a category of two-dimensional figures also belong to all subcategories of that category. For example, all rectangles have four right angles and squares are rectangles, so all squares have four right angles.


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