Showing a Triangle Is Right Angled

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Determine whether it is right or not. Using the Pythagorean Theorem, the video shows how to determine whether a triangle is a right triangle. Pupils practice the skill in a few of the problems in the associated worksheets on the Pythagorean Theorem.

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CCSS: Adaptable
Instructional Ideas

  • Provide more practice problems
  • Remind the class not to use the image but rely on the calculations to draw a conclusion
Classroom Considerations

  • Individuals should know the Pythagorean Theorem
Pros

  • Labels the sides to show how the they correspond to the formula
  • Writes the formula for every problem
Cons

  • It's difficult to find the answer keys