# Applications of the Pythagorean Theorem: Lesson

##### This Applications of the Pythagorean Theorem: Lesson video also includes:

The Pythagorean Theorem works for something other than right triangles; show your class all it can do. Using information from the Pythagorean Theorem, the video shows how to determine whether a triangle is an acute or obtuse triangle. Part of a large geometry playlist, the video uses the Pythagorean Theorem to find the distance between two points and introduces the distance formula.

##### Instructional Ideas

• Conduct a mini-lesson to derive the distance formula from the Pythagorean Theorem
• Struggling learners may benefit from the reverse of the rule to classifying triangles by putting C squared first
##### Classroom Considerations

• Pupils should know the classifications of triangles
##### Pros

• Links to more CK-12 Pythagorean Theorem application resources
• Provides worked examples
##### Cons

• The last summary of the rule to classify triangles is incorrect, square each quantity instead