Classifying Triangles Card Sort - PDF & Digital

Grade Levels
4th - 10th
Resource Type
Formats Included
  • PDF
  • Google Apps™
Includes Sorting Page, Triangles to Sort, and Answer Key
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Includes Google Apps™
The Teacher-Author indicated this resource includes assets from Google Workspace (e.g. docs, slides, etc.).
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  1. This bundle includes all the notes, worksheets, & activities in my store that pertain to High School Geometry.Does this Include Digital Resources?As of June 2022 over 65% of this bundle includes a digital Google Slides or Forms option.Please view the preview to view the content list & which
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Printable PDF & Digital Versions are included in this distance learning ready sorting activity will strengthen students’ skill in sorting triangles into the following types of triangles categories: Equilateral, Isosceles, Scalene, Equiangular, Right, Acute, and Obtuse. Students will cut out the 18 included triangles and use the given information on each triangle to sort it into the correct spot on the chart.

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Please view the preview to see the resource in more detail


Important Information

  • With this product you get a version of the chart with and without QR codes so you can choose which version to use in your classroom. The QR Codes next to the different types of triangles give the definitions of each type of triangle.
  • The fact that the angles in a triangle add up to 180° (Triangle Sum Theorem) is required for some of the triangles. If doing this with younger students I recommend you quickly introduce that concept and find the missing angles in the triangles before letting the students complete the activity.
  • There are 5 “Not Possible” cards that students will put in 5 of the squares on the chart. When classifying triangles students are expected to classify triangles into the most specific category. Thus, “Isosceles & Equiangular” is marked as Not Possible because any isosceles triangle that is equiangular is also equilateral so the most specific category would be “Equilateral & Equiangular”.
  • The letters inside each triangle make for easy teacher checking by just checking the letter.
  • Answer key included

Related Resources

o Click Here for more Triangles & Transformations activities

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Total Pages
Includes Sorting Page, Triangles to Sort, and Answer Key
Answer Key
Teaching Duration
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to see state-specific standards (only available in the US).
Classify two-dimensional figures in a hierarchy based on properties.


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