A surprising topological proof - You can always cut three objects in half with a single plane

A surprising topological proof - You can always cut three objects in half with a single plane

Assessment

Interactive Video

Information Technology (IT), Architecture, Physics, Science

11th Grade - University

Hard

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The video tutorial explores the Borsec Coulomb theorem, demonstrating its application in proving that a single plane can cut multiple objects in half by volume. The explanation begins with a simple case of mapping a circle to a line, ensuring continuity, and extends to higher dimensions. The tutorial uses the theorem to show that for any two objects in a plane, a line exists that cuts them in half by area. This concept is then extended to three dimensions, where a plane can cut three objects in half. The video emphasizes the continuity of mappings and the existence of antipodal points mapping to the same value.

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4 questions

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1.

OPEN ENDED QUESTION

3 mins • 1 pt

What is the significance of the distance between lines in the context of the proof?

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2.

OPEN ENDED QUESTION

3 mins • 1 pt

Summarize the key steps taken to arrive at the conclusion of the proof.

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3.

OPEN ENDED QUESTION

3 mins • 1 pt

In what way does the proof extend to three dimensions?

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4.

OPEN ENDED QUESTION

3 mins • 1 pt

What does the theorem imply about the existence of a specific plane that cuts all objects in half?

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