# 9-cube

In geometry, a 9-cube is a nine-dimensional hypercube with 512 vertices, 2304 edges, 4608 square faces, 5376 cubic cells, 4032 tesseract 4-faces, 2016 5-cube 5-faces, 672 6-cube 6-faces, 144 7-cube 7-faces, and 18 8-cube 8-faces. It can be named by its Schläfli symbol {4,37}, being composed of three 8-cubes around each 7-face. It is also called an enneract, a portmanteau of tesseract (the 4-cube) and enne for nine (dimensions) in Greek. It can also be called a regular octadeca-9-tope or octadecayotton, as a nine-dimensional polytope constructed with 18 regular facets. It is a part of an infinite family of polytopes, called hypercubes. The dual of a 9-cube can be called a 9-orthoplex, and is a part of the infinite family of cross-polytopes. (Wikipedia).

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From playlist Illustrative Mathematics Grade 6 Unit 1

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A number pattern that results in numbers with 8 for a digit

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Find a nine digit numbers, using the numbers 1 to 9, and using each number once without repeats, such that; the first digit is a number divisible by 1. The first two digits is a number divisible by 2; The first three digits is a number divisible by 3 and so on until we get a nine digit num

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thanks for the suggestion!

We look at a nice viewer suggested number theory problem. Suggest a problem: https://forms.gle/ea7Pw7HcKePGB4my5 Please Subscribe: https://www.youtube.com/michaelpennmath?sub_confirmation=1 Merch: https://teespring.com/stores/michael-penn-math Personal Website: http://www.michael-penn.

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Factoring Trinomials & Polynomials, Basic Introduction - Algebra

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Learn how to work with radicals in this comprehensive review by Mario's Math Tutoring. We go through 20 examples involving simplifying square roots, cube roots, fourth roots, etc. We also go through how to rationalize radicals when there is a radical in the denominator. We discuss workin

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Negative and Fractional Indices (Higher Only) | GCSE Maths Tutor

A video revising the techniques and strategies surrounding the laws of indices, focusing on negative and fractional indices for the higher tier paper. This video is part of the Number module in GCSE maths, see my other videos below to continue with the series. These are the calculators t

From playlist Aiming for Grades 7-9 Maths Series

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From playlist Indices, powers & roots

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