# Thales & Pythagoras Lesson Plan

Instructor: John Hamilton

John has tutored algebra and SAT Prep and has a B.A. degree with a major in psychology and a minor in mathematics from Christopher Newport University.

Educate your students about Thales and Pythagoras with this helpful lesson plan. They will view a video lesson about Thales and Pythagoras, take a related lesson quiz, and participate in a fun, hands-on activity.

## Learning Objectives

After studying this lesson about Thales and Pythagoras, your students will be able to:

• Describe the early lives of Thales and Pythagoras
• Explain several of the contributions to geometry made by the two men
• Recount how these contributions are still used to this day

1 - 1.5 Hours

## Materials

• Copy of the text lesson Thales & Pythagoras: Early Contributions to Geometry, along with the related lesson quiz
• Internet access
• Protractors (with a small center hole)
• Scissors
• Straw (not the bendy type)
• String (about one-foot in length)
• Tape (clear)
• Weight (small weight, a small metal nut will work)
• Print copies of isosceles right triangle found below in the activity instructions

## Curriculum Standards

• CCSS.MATH.CONTENT.HSG.SRT.A.2

Given two figures, use the definition of similarity in terms of similarity transformations to decide if they are similar; explain using similarity transformations the meaning of similarity for triangles as the equality of all corresponding pairs of angles and the proportionality of all corresponding pairs of sides.

## Warmup

• Let your students know they will be studying the two famous Greek mathematicians Thales and Pythagoras.
• Ask them if anyone is familiar with the two men, or has studied them previously.
• Read the short introduction to this lesson.

## Instructions

• Start the video Thales & Pythagoras: Early Contributions to Geometry and pause the video for the first time at 0:45.
• What does the field of geometry entail?
• Now, restart the video and pause this time at 2:14.
• What five contributions did Thales make to geometry?
• Next, restart the video again and pause this time at 3:32.
• What four contributions did Pythagoras make to geometry?
• Now, restart the video and pause for a final time at 4:02.
• Which of the contributions by the two men is used most today?
• Restart the video and watch the 'Lesson Summary' section on the two mathematicians.
• Have your students take the lesson quiz to demonstrate their newfound knowledge of the two men.

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