Maths29/91
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Surface area of a sphere opened up

The surface area of a sphere is opened up to illustrate how the formula surface area = 4 π r2 can be understood. The animation starts with a lined sphere. The upper and lower hemisphere skins then open out to form the sphere’s enclosing cylinder. This cylinder unwraps to demonstrate how its circumference (2πr) and its height (2r) combine to give 4πr2.

Deakin, Australian Capital Territory, Australia
Animation ID: SPHERE_Unwrapping_UHD
Duration: 00:10
copyright Russell Kightley
Animation resolution: 3840x2160 pixels @ 30.0 fps, ~33.6 Mbits/s
Animation keywords: ball, circle, geometry, math, mathematics, maths, pi, sphere, surface area
Surface area of a sphere opened up2020-08-12T08:25:57ZThe surface area of a sphere is opened up to illustrate how the formula surface area = 4 π r2 can be understood. The animation starts with a lined sphere. The upper and lower hemisphere skins then open out to form the sphere’s enclosing cylinder. This ...PT10Shttps://d38zjy0x98992m.cloudfront.net/2799285c-3d45-42f1-a936-bf2f22d876bb/SPHERE_Unwrapping_UHD_xlarge.jpghttps://d38zjy0x98992m.cloudfront.net/2799285c-3d45-42f1-a936-bf2f22d876bb/SPHERE_Unwrapping_UHD_mp4_hd_video.mp4https://www.scientific.pictures/-/galleries/maths/-/medias/2799285c-3d45-42f1-a936-bf2f22d876bb/pricehttps://www.scientific.pictures/-/galleries/maths/-/medias/2799285c-3d45-42f1-a936-bf2f22d876bb/price