Kenyon Lee Guesses Your Top With Math

  • Kenyon Lee, who runs the TikTok account @ kentai.haven, has an uncanny knack for guessing the height of people with a bit of internet sleuthing and a lot of math.
  • He amassed 2.5 million followers in four weeks.
  • One day he hopes to be able to outline his process in a scientific research paper.

    Don’t even try to lie to Kenyon Lee about your size.

    The 18-year-old University of Memphis student follows your social media posts until he finds “evidence” to compare your arms and hands to other objects in the background, analyze each video frame by frame, and finally use math to do math Your size.

    You love numbers. We also. Let’s solve some math problems together.

    It can take Lee over 8 hours to get through it, but he’s committed and his 2.5 million followers on TikTok just won’t rest until he finds out how tall everyone on the planet is.

    We know: that sounds pretty intense. But it’s the basis for the hugely popular viral videos on Lee’s TikTok account @ kentai.haven. About four weeks ago he posted his first video trying to guess the size of another TikTok user by relying solely on a stool in her room and the average measurements for two human bones in the leg, the femur and the Tibia, propped. Lee guessed she was about six feet tall – and he was right.

    Lee went to bed with 30 followers and woke up to over 1 million views and the idea of ​​capitalizing on his newfound fame. “I felt famous,” he tells Popular Mechanics, “but now I have over 800,000 followers in one day.”

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    At the height of his popularity, Lee says his mentions exploded. 10,000-20,000 TikTokers tagged him on people’s videos every day, asking him to guess their size using his unorthodox method. How does he decide which videos to ultimately follow up?

    “If I make my mentions and see that it’s the same video – it’s viral – I jump on it. Sometimes a celebrity challenges me and when I’m not too busy I try to coordinate with them, but I always keep it organic, “says Lee.” Some people think I have them telling me their size, but they don’t. “

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    While Lee is unwilling to divulge all of his secrets – including the special formulas he developed to determine the size of people – he will reveal some of his processes. He uses linear algebra, geometry, calculus, some statistics and basic rules about human anatomy.

    Step one: Scroll to the bottom of the person’s TikTok profile and watch all of the videos until you find good evidence, explains Lee. If the person has other social media accounts like YouTube, they’ll watch hours of those videos too.

    This sleeping is the most time consuming part of the process, as Lee needs to find references to help him determine the distance between the person’s elbow and the top of their middle finger. Or he uses an object they are holding to calculate their hand size.

    Golden cut

    jpa1999Getty Images

    It all boils down to the “golden ratio” or “golden number,” says Lee. Phi, represented by the Greek symbol Φ, is 61803399. It has unique geometrical properties, as found in early writings by the Greek mathematician Euclid (the “father of geometry”) around 300 BC. Mentioned BC

            One of the most popular examples of this is the Fibonacci sequence, a series of numbers in which each is the sum of the two preceding numbers. In this sequence of numbers – 0, 1, 1, 2, 3, 5, 8, 13, 21, 34 – this rule applies. Examples of this are abundant in nature, especially in phyllotaxis, or the study of how leaves, twigs, flowers or seeds arrange themselves. For example, in a sunflower, the seeds are arranged in the center of the flower along curved lines that rotate clockwise and counterclockwise to form a spiral.

            While it doesn’t seem like a spiral in the center of a flower has anything to do with a person’s height, the same golden ratio can be used to describe the relationship between the height of an adult human and that of his or her navel, or length of her forearm compared to that of her hand.

            Of course, this is not a hard and fast rule, and some mathematicians say that this way of applying the golden number is based on myth.

            Lee also believes that the standard human ratio for the wingspan is 1: 1 with its height, which means that your outstretched arms should be the same length from your right index finger to your left index finger as your height. “It can make up to 7 percent difference,” says Lee, “but I take this game of chance.”

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            For example, when Lee was making a video about a basketball player, he would add the average height index for NBA players and subtract that from the wingspan to get the man’s height correctly.

            In 30 videos, Lee only got three or four heights wrong, giving him an accuracy of about 90 percent.

            Kenyon Lee shows some of his equations for calculating height on a whiteboard

            Screenshot / zoom

            At the moment, Lee is pretty busy with his studies, but he managed to save some free time to study even more math in the evening. As he gains more knowledge, he hopes that he will be able to perfect his formulas even better. (That’s part of his methodology on the whiteboard above.)

            While putting these equations together, Lee searched academic journals and could not find any peer-reviewed research close to his methodology. He’s hoping to someday collect more data by finding the heights for a few thousand people and running his method until he gets a more accurate average for his rules.

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            Even if that doesn’t work, Lee plans to use his math skills. He says he wants to become an engineer one day or maybe do computer science.

            But until then, he’s perfectly happy to be known as “the great man” on TikTok.

            “I have no problem with that,” says Lee. “Then you know you did it – when people can just describe you in a few words and know who you are. I want to be the CEO who guesses it all.”

            🎥 Now look at this:

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