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kchangnyt's profile
Kenneth Chang
Kenneth Chang
Kenneth Chang
@kchangnyt

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Kenneth Chang

@kchangnyt

Science reporter at the New York Times. Pluto, dinosaurs, NASA, viral math & more...

New York, NY
nytimes.com/by/kenneth-cha…
Joined April 2014

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    1. Kenneth Chang‏ @kchangnyt 6 Aug 2019

      Here's a new, more interesting math problem. How many triangles? https://nyti.ms/2YKDk9f pic.twitter.com/8s76GRF7C0

      26 replies 48 retweets 142 likes
    2. Mike Garrahan‏ @mgarr_aha 6 Aug 2019
      Replying to @kchangnyt

      Each triangle is a combination of 3 out of 6 lines. With n=6 and r=3, nCr = 20.

      2 replies 1 retweet 22 likes
      Kenneth Chang‏ @kchangnyt 6 Aug 2019
      Replying to @mgarr_aha

      Bingo!

      3:17 PM - 6 Aug 2019
      • 3 Likes
      • Just a morra ｉ Mike Garrahan
      0 replies 0 retweets 3 likes
        1. This Tweet is unavailable.
        2. Mike Garrahan‏ @mgarr_aha 6 Aug 2019

          The image in the article doesn't show those borders. If we include them anyway, each horizontal edge adds 4C2=6 triangles, and each vertical edge adds 1, for a total of 34.

          1 reply 0 retweets 0 likes
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