Right Triangles Lesson Plan

Instructor: Josh Corbat

Josh has taught Earth Science and Physical Science at the High School level and holds a Master of Education degree from UNC-Chapel Hill.

Use this lesson plan to introduce your students to right triangles. Students will watch a video lesson, perform several sample problems, solve real-world application problems, and write their own word problems involving right triangles.

Learning Objectives

After this lesson, students will be able to:

  • define right triangle.
  • perform several different calculations based on theorems and proofs of right triangles.


30 - 60 minutes

Curriculum Standards


Explain a proof of the Pythagorean Theorem and its converse.


Apply the Pythagorean Theorem to determine unknown side lengths in right triangles in real-world and mathematical problems in two and three dimensions.


  • Measuring tape

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