Sorting activity. Students are given sets of 3 numbers. Students use must decide if the 3 numbers would form a triangle, and if it does use Pythagorean’s Inequalities to determine if the triangle is a right, obtuse or acute triangle.
There are 2 versions for the sort. One with whole numbers and the other includes fraction, decimals and square roots. Also included is a sorting mat for student to use. After completing the sort, I have my students draw the mat in their ISN and write in at least 2 examples of each type.
Alternative Sort: When we first learn about triangle inequalities, we only look at whether the numbers will form a triangle. So the first time I use this sort student will sort the numbers into 2 piles: It can be a triangle, it can’t be a triangle. I have included a mat for this sort also.
• Bell work
• Homework alternative
• Check for understanding
• Interactive Student Notebooks