Check out these 11 activities to get students real world practice with the triangle inequality theorem. This post includes print and go resources, online math tools, challenge questions, and more. Check it out!
Triangle inequality theorem

Triangle Inequality Theorem Worksheet Pdf
Triangle Inequality Theorem (V1): Students can use this interactive applet to intuitively and informally discover this theorem.
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Triangle Inequality Theorem
Triangle Inequality Theorem Discovery Activity 7.G.A.2


This card sort activity is the perfect way for High School geometry students to review the triangle inequality theorem and the Pythagorean theorem. This card sort activity requires students to use the Triangle Inequality Theorem, Converse of the Pythagorean Theorem, and Pythagorean Inequality Theorems to classify triangles as Acute, Obtuse, Right, or Not a Triangle when given 3 side lengths. This high school geometry activity is so much more fun than a regular free geometry worksheet.
Triangle Inequality Theorem Ppt
misscalcul8: Geometry Unit 4: Triangles Interactive Notebook
Testing triangle sides for geometry can be as simple as cutting strips of paper in various measures. Allow students to test the various combinations to see if a triangle can be formed. Then as a class, establish the triangle rule that the sum of the lengths of any two sides of a triangle has to be greater than the length of the third side. Save this hands on math activity for later and follow me for more middle school math tips.








Triangle Inequality Theorem Worksheet
Free Triangle Inequality Theorem foldable for Geometry Classroom
The Triangle Inequality Theorem Interactive Notebook Page for Geometry
misscalcul8: Geometry Lessons