02 Feb 20copy & paste+upvote-downvoteHere's a visual proof that (2a+1)²=8Tₐ+1, where Tₐ is a triangle number Tₐ = 1+2+...+a
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⚫️⚫️🔴🔴🔴⚫️⚫️… https://t.co/PUE1xIglft
“@_lexiemichelee: @MariaCabayubi you know how slow I am Maria. But it looks really good”hah I know this. But thank youuu
14 Jan 13copy & paste+upvote-downvote“@_lexiemichelee: @MariaCabayubi you know how slow I am Maria. But it looks really good😍😘👏💖”hah I know this. But thank youuu ☺😚💜💜