Видео с ютуба Surface Area Of Of Circle

Area of a circle, formula explained

Math Antics - Circles, Circumference And Area

But why is a sphere's surface area four times its shadow?

The Area of the Circle - Math for Kids

Area and Perimeter: Circles

Explaining How to Find the Surface Area of a Circle

Area of a Circle | MathHelp.com

How to Find the Area of a Circle | Area of a Circle Step by Step

Circles - Area, Circumference, Radius & Diameter Explained!