Polygons by the number of sides | Constructible polygons | Elementary shapes

In geometry, a dodecagon or 12-gon is any twelve-sided polygon. (Wikipedia).

How to Construct a Dodecahedron

How the greeks constructed the Dodecahedron. Euclids Elements Book 13, Proposition 17. In geometry, a dodecahedron is any polyhedron with twelve flat faces. The most familiar dodecahedron is the regular dodecahedron with regular pentagons as faces, which is a Platonic solid. A regular dode

From playlist Platonic Solids

Post-it Note Dodecahedron: Your Photos

From playlist My Maths Videos

Dodecahedron in Geogebra Step by step tutorial on this link: https://youtu.be/FPDOfPhheFk In case you wanna to pay me a drink: https://www.paypal.me/admirsuljicic/

From playlist Geogebra [Tutoriali]

Regular dodecagon surprises. How to prove? Source: Antonio Gutierrez. https://geogebra.org/m/wxywrnwh #GeoGebra #MTBoS #ITeachMath #geometry #math #maths #proof #ProofWithoutWords #EdTech #MathChat #GeomChat

From playlist Geometry: Challenge Problems

Dodecahedron in Geogebra [Tutorial]

Dodecahedron in Geogebra [Tutorial] In case you wanna to pay me a drink: https://www.paypal.me/admirsuljicic/

From playlist Geogebra [Tutoriali]

Area of dodecagon from a square!

This is a short, animated visual proof demonstrating that the area of a regular dodecagon inscribed in the unit circle has an area of exactly 3. #math #manim #visualproof #mathvideo #geometry #mathshorts #geometry #mtbos #animation #theorem #pww #proofwithoutwords #proof #it

From playlist MathShorts

Dodecaplex: the puzzle from the fourth dimension!

Check out Dodecaplex on Maths Gear! https://mathsgear.co.uk/products/dodecaplex-puzzle Dodecaplex is based on the mathematics of Saul Schleimer and Henry Segerman. Henry Segerman http://www.segerman.org/ Saul Schleimer http://homepages.warwick.ac.uk/~masgar/ You can read more about the

From playlist Guest appearances

Canonical structures inside the Platonic solids III | Universal Hyperbolic Geometry 51

The dodecahedron is surely one of the truly great mathematical objects---revered by the ancient Greeks, Kepler, and many mathematicians since. Its symmetries are particularly rich, and in this video we look at how to see the five-fold and six-fold symmetries of this object via internal str

From playlist Universal Hyperbolic Geometry

Area of a Regular Dodecagon III (visual proof)

This is a short, animated visual proof demonstrating that the area of a regular dodecagon inscribed in the unit circle has an area of exactly 3. #math #manim #visualproof #mathvideo #geometry #mathshorts #geometry #mtbos #animation #theorem #pww #proofwithoutwords #proof #it

From playlist Geometric Constructions

How to find the individual measurement of an interior angle for a regular dodecagon

👉 Learn how to determine the measure of the interior angles of a regular polygon. A polygon is a plane shape bounded by a finite chain of straight lines. A regular polygon is a polygon whose sides are congruent (equal). The interior angle of a polygon is the angle between two sides of the

From playlist One Interior Angle of a Polygon

A Tough Geometry Question that Teachers Love to Ask (Non-Calculator!!) | Can You Solve It?

Can You Solve This? Videos to watch to help with this question: Exact Trigonometric Values - https://youtu.be/wBX0YXKThBs Pythagoras Theorem - https://youtu.be/JCG4HHGVqiY Area of a Triangle Using Sine - https://youtu.be/8fzPUPnFy-w These are the calculators that I recommend 💎 Casio

From playlist Can You Solve This? | Grade 9 Extension Playlist

Python Programming 10. The Python Turtle Part 2

This is the tenth in a course of computer science video lessons introducing programming with Python. This video shows how the Python Turtle library, which allows you to draw, can be combined with other programming constructs such as selection with if blocks and iteration with while loops.

From playlist Python Programming Step by Step

Find the Measure of the Angle of a Regular Dodecagon

Find the Measure of the Angle of a Regular Dodecagon If you enjoyed this video please consider liking, sharing, and subscribing. Udemy Courses Via My Website: https://mathsorcerer.com My FaceBook Page: https://www.facebook.com/themathsorcerer There are several ways that you can help su

From playlist Polygons

Find the Sum of the Angles of a Dodecagon

Find the Sum of the Angles of a Dodecagon If you enjoyed this video please consider liking, sharing, and subscribing. Udemy Courses Via My Website: https://mathsorcerer.com My FaceBook Page: https://www.facebook.com/themathsorcerer There are several ways that you can help support my ch

From playlist Polygons

My second entry for the 3Blue1Brown Summer of Math Exposition Contest

In this video I am explaining what I believe to be the logic behind the design of the Western Arabic Numerals. I believe they were designed by someone using base twelve geometry, and in this video I show the logic that was used in their creation.

From playlist Summer of Math Exposition Youtube Videos

Area of a Regular Dodecagon II (visual proof)

This is a short, animated visual proof demonstrating that the area of a regular dodecagon inscribed in the unit circle has an area of exactly 3. #math #manim #visualproof #mathvideo #geometry #mathshorts #geometry #mtbos #animation #theorem #pww #proofwithoutwords #proof #it

From playlist Proofs Without Words

Interior and Exterior Angles of Polygons (Formulas)

Learn how to find interior and exterior angles in polygons as well as in regular polygons in this video math tutorial by Mario's Math Tutoring. We discuss 4 formulas in this video as well as go through 6 example problems (3 of which are word problems). Related Videos to Help You Succee

From playlist Geometry

What are four types of polygons

👉 Learn about polygons and how to classify them. A polygon is a plane shape bounded by a finite chain of straight lines. A polygon can be concave or convex and it can also be regular or irregular. A concave polygon is a polygon in which at least one of its interior angles is greater than 1

From playlist Classify Polygons