Show high schoolers that right triangles are radical. Learners see how the lengths of the sides of a 45-45-90 triangle relate. Using that relationship, pupils observe how to find any of the lengths given one side of a triangle. They go on to practice the skill using the included worksheets.

Concepts

special right triangles, right triangles, simplify radicals

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Instructional Ideas

• Ask class members to come up with a mnemonic to help remember the operation required to get from one side to another

Classroom Considerations

• Installment three in a unit with six parts
• Requires knowledge on how to simplify radicals

• This video is hosted on YouTube

Pros

• Contains a detailed answer key showing the steps to solve each problem
• Pauses the presentation to allow learners to try two problems on their own before providing the answer

Cons

• None