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  1. Tetractys - Wikipedia

    The Tetractys [also known as the decad] is an equilateral triangle formed from the sequence of the first ten numbers aligned in four rows.

  2. The Tetractys Symbol - Ancient Symbols

    It consists of 10 dots that are arranged in four rows (with four, three, two and one dot in each row) such that they make a triangular figure pointing upwards. ‘Tetracyts’ is a Greek word that means the …

  3. Tetractys: A Timeless Symbol of Knowledge and Harmony

    Jan 22, 2024 · The Tetractys plays an important role in meditation and rituals, especially in traditions shaped by Pythagorean and mystical ideas. This sacred geometric symbol acts as a key focus for …

  4. The Tetractys - Superphysics

    There are, therefore, two tetractys of numbers, one of which subsists by addition, but the other by multiplication. They comprehend musical, geometrical, and arithmetical ratios.

  5. Tetractys Explained

    In English-language poetry, a tetractys is a syllable-counting form with five lines. The first line has one syllable, the second has two syllables, the third line has three syllables, the fourth line has four …

  6. Tetractys in Pythagorean Mysticism - sacredillusion.com

    May 20, 2025 · The Tetractys is a triangular figure with ten points arranged across four rows, embodying the principles of harmony and balance central to Pythagorean thought. Its design encodes harmonic …

  7. Encyclopedia Masonica | TETRACTYS

    This arrangement of the ten points in a triangular form was called the tetractys or number four, because each of the sides of the triangle consisted of four points, and the whole number of ten was made up …

  8. Tetractys - from Wolfram MathWorld

    Dec 3, 2025 · A tetractys, also called a tetraktys or decad, is an arrangement of 10 points in the form of a triangle with 1 point in the first row, two in the second, three in the third, and four in the fourth.

  9. The Tetractys: Understanding Its Historical Impact : MysteryLores

    May 26, 2025 · The Tetractys, an ancient symbol known to the Pythagoreans, is aligning itself with modern spiritual practices. Users indicate that this geometric figure embodies multiple layers of …

  10. The Meaning of the Tetractys – Musical Symbolism in Pythagorean ...

    The Tetractys symbol is an exquisite example of how a simple visual pattern can have multi-varied meanings and ‘levels’ of interpretive significance. The famous Pythagorean oath refers to the …