Area of a Circle - Quick Visual Proof @tecmath

Uploaded August 2021 | Updated September 2026, 2 weeks ago

This easy visual proof shows that the area of a circle is πr2.

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$Adding and Subtracting Fractions with the Same Denominator Adding and Subtracting Fractions with the Same Denominator. This video is part of a playlist: https://www.youtube.com/playlist?list=PLjbxBzUM6SLnSYop8JXLu9zciW-rn7yyD To support tecmath making new math videos on Patreon: https://www.patreon.com/tecmath To donate to the tecmath channel: https://paypal.me/tecmath?locale.x=en_AU To support tecmath on Patreon: https://www.patreon.com/tecmath To buy tecmath mechandise: https://teespring.com/stores/tecmath-store #fractions #fraction #fractionsmath$