Although the vast majority of coins are round, coins are made in a variety of other shapes, including squares, diamonds, hexagons, heptagons, octagons, decagons, and dodecagons. They have also been struck with scalloped (wavy) edges, and with holes in the middle. Coins in the shape of polygons often have rounded edges or are Reuleaux polygons. This article focuses mainly on circulating coins; a number of non-circulating commemorative coins have been made in special shapes, including guitars, pyramids, and maps. There is a list with more unusual shapes of non-circulating commemorative coins at the end of this page, that all have been issued officially by various countries. (Wikipedia).
How do I make a round dice set?
Today I will make some unusual dice. They will not be square but round and we will make them completely out of metal, with a wooden stand. Enjoy! #dice#W&M#lathe
From playlist Random problems
A new beginning for the Middle East: The Cyrus Cylinder and Ancient Persia
The Cyrus Cylinder is one of the most famous objects to have survived from the ancient world. It was inscribed in Babylonian cuneiform on the orders of Persian King Cyrus the Great (559-530 BC) after he captured Babylon in 539 BC. The cylinder is often referred to as the first bill of hum
From playlist Art of the ancient Mediterranean | Art History | Khan Academy
Triangle Congruence (quick review)
More resources available at www.misterwootube.com
From playlist Further Properties of Geometrical Figures
In this video, you’ll learn more about decimals. Visit https://www.gcflearnfree.org/decimals/ for our interactive text-based tutorial. This video includes information on: • Reading decimals • Comparing decimals We hope you enjoy!
From playlist Math Basics
Except for change, the nickel often escapes notice. But that wasn’t always true. In 1883, a nickel design was released that would cause enormous consternation for the U.S. mint, and led to fraud all over the country. The most famous fraudster of the 1883 ‘racketeer nickel,' is said to have
From playlist History without War
The Manila Mint and the End of the Colonial era
The mint in Manila was the only US mint ever outside the continental United States. The coins minted there and in the US for the Philippines represent an era when the nation moved from the colonial period to nationhood, and the two World Wars that came to shape that process. The History
From playlist Economic History
Gold, silver & bronze - Periodic Table of Videos
With Olympic fever sweeping the world, we compare the medals (and metals) athletes compete for - namely gold, silver and bronze. More links in description below ↓↓↓ Support Periodic Videos on Patreon: https://www.patreon.com/periodicvideos A video on every element: http://bit.ly/118ele
From playlist Gold Videos - Periodic Videos
THG Podcast: America's Forgotten Mints
Listen to this episode of the THG Podcast, which posts in addition to regular History Guy content, about a month after it releases on podcast services. Subscribe to the RSS feed for more: https://feeds.captivate.fm/thehistoryguy/ Check out our new community for fans and supporters! https
From playlist Podcast
Pawn Stars: 1963 "The Jetsons" Lunchbox (Season 15) | History
After Corey buys a "Jetsons" lunchbox on good faith that the seller will mail him the missing thermos, all he can do is wait for the future to arrive in this clip from "Some Serious Coinage". #PawnStars Subscribe for more from Pawn Stars: http://po.st/SubscribeToPawnStars Watch more Pawn
From playlist Pawn Stars: Official Series Playlist | New Episodes Wednesdays at 8/7c | History
From playlist Drawing a sphere
"3,000 Years of Glassmaking in the Eastern Mediterranean – an Introduction" by Thilo Rehren
Glass is not only the youngest of the three main man-made archaeological materials (ceramic/plaster and metals being the two others), but also the most dazzling in appearance, and most complex in composition. The lecture will provide a brief introduction to glass as a material, focussing t
From playlist On Broken Glass (Spring 2021)
Surface Area of a Prism (2 of 2: Example question)
More resources available at www.misterwootube.com
From playlist Applications of Measurement
History of America's Forgotten Mints
As the United States expanded, the Treasury department needed to establish assay offices and branch mints to allow miners and prospectors to turn their gold and silver into coins. The history of the nation's forgotten mints is the history of those thousands of men and women who went to th
From playlist History without War
The Colossus of Rhodes - The Mystery Behind the Tallest Statue in the Ancient World
In this long installment of Trey the Explainer, I will discuss the mysterious origins, history, and fate of the Colossus of Rhodes: Seventh Wonder of the Ancient World. We will learn a lot about Hellenistic history, Greek archaeology, ancient art, and the nature of building too tall. I hop
From playlist Anthropology Profile
Introduction to Decimals, lesson 12 #shorts
Watch the full playlist: https://www.youtube.com/watch?v=kcxK3_sROZA&list=PL14bv5vXK2WWuODhGbpPQA0GamV5ohOVb&index=1 Our Decimal System lets us write numbers as large or as small as we want, using the decimal point. Digits can be placed to the left or right of a decimal point, to show valu
From playlist Celebrities Teach Math: The Number System
This video introduces similarity and explains how to determine if two figures are similar or not. http://mathispower4u.com
From playlist Number Sense - Decimals, Percents, and Ratios
Celtic, Phoenician & Greek Colonists | The History of Spain: Land on a Crossroad | The Great Courses
Ancient Spain boasted mariners whose skills were world-renowned, coinage that simplified trade, and iron swords that could cut through bronze weapons—and they all came from overseas. Three peoples came to Spain and left their mark on the country forever. Forget about 'Hamilton'—watch these
From playlist Latest Uploads