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CIRCLE AREA2019-04-10T04:32:44ZCIRCLE AREA: Animation explaining the formula for the surface area of a circle.PT11Shttps://d3e1m60ptf1oym.cloudfront.net/5f9d9da8-222d-478c-b281-010a5dbac7b5/CIRCLE-AREA-Russell-Kightley_SEPIA_xlarge.jpghttps://d3e1m60ptf1oym.cloudfront.net/5f9d9da8-222d-478c-b281-010a5dbac7b5/CIRCLE-AREA-Russell-Kightley_SEPIA_mp4_hd_video.mp4https://www.scientific.pictures/-/galleries/animations/-/medias/5f9d9da8-222d-478c-b281-010a5dbac7b5/pricehttps://www.scientific.pictures/-/galleries/animations/-/medias/5f9d9da8-222d-478c-b281-010a5dbac7b5/price