A quatrefoil (anciently caterfoil) is a decorative element consisting of a symmetrical shape which forms the overall outline of four partially overlapping circles of the same diameter. It is found in art, architecture, heraldry and traditional Christian symbolism. The word 'quatrefoil' means "four leaves", from the Latin quattuor, "four", plus folium, "leaf"; the term refers specifically to a four-leafed clover, but applies in general to four-lobed shapes in various contexts. In recent years, several luxury brands have attempted to fraudulently assert creative rights related to the symbol, which naturally predates any of those brands' creative development. A similar shape with three rings is called a trefoil. (Wikipedia).
Ghiberti, "Gates of Paradise," east doors of the Florence Baptistery
Lorenzo Ghiberti, "Gates of Paradise," East Doors of the Florence Baptistery, bronze, 1425-52. Speakers: Dr. Steven Zucker and Dr. Beth Harris. Created by Beth Harris and Steven Zucker.
From playlist Renaissance & Reformation in Europe | Art History | Khan Academy
What is the difference between convex and concave
👉 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
Please watch our updated video (see below), Brunelleschi & Ghiberti, the Sacrifice of Isaac
Please watch our updated video here: https://youtu.be/8qivmAur1-k Brunelleschi & Ghiberti, Sacrifice of Isaac, competition panels for the second set of bronze doors for the Florence Baptistery, 1401-2 Speakers: Dr. Steven Zucker and Dr. Beth Harris. Created by Beth Harris and Steven Zucke
From playlist Renaissance & Reformation in Europe | Art History | Khan Academy
Giotto, Arena (Scrovegni) Chapel (part 3)
Part 3: The Lamentation from Giotto's Arena (Scrovegni) Chapel, Padua, c. 1305 Speakers: Dr. Beth Harris & Dr. Steven Zucker. Created by Beth Harris and Steven Zucker.
From playlist Renaissance & Reformation in Europe | Art History | Khan Academy
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
What is the difference between convex and concave 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
Triangle Congruence (quick review)
More resources available at www.misterwootube.com
From playlist Further Properties of Geometrical Figures
Explora conmigo los canales y las plazas de Venecia para entender su arquitectura y su fascinante diseño urbano. Watch in English: https://youtu.be/e6QYsMvRbDk Dale like y suscríbete para ver más vídeos como este. Salúdame en mis redes: Patreon: https://www.patreon.com/manuelbravo Faceb
From playlist Arquitectura en español
Explore with me the canals and squares of Venice to understand its architecture and its fascinating urban design. Subtitles available in several languages. Ve el vídeo en español: https://youtu.be/uPsGxHVFl7U Like and subscribe to see more videos like this. Books I read for this episode
From playlist Vídeos
What are the names of different types of polygons based on the number of sides
👉 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
Introduction to Polygons - Geometry
Learn the definition of polygon - a very important shape in geometry. When a polygon has a small number of sides, there is a word you use instead of "polygon". We teach you the names of polygons with 3 to 10 sides. Geometer: Louise McCartney Artwork: Kelly Vivanco Written by Michael Ha
From playlist Geometry lessons
What is the difference between concave and convex 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
#Cycloid: A curve traced by a point on a circle rolling in a straight line. (A preview of this Sunday's video.)
From playlist Miscellaneous
We Love Opera! What is a recitative in an opera?
A quick definition of the opera term "recitative." It's a little break from the more complicated singing. Want to go to the opera, but you're not sure you'll understand what's going on? "We Love Opera" is a video series from Socratica that will help you understand what opera is all abo
From playlist Opera Glossary
Lecture 4, "But, Lord, He Stinketh!": Marco Pino's The Resurrection of Lazarus
Marco Pino was the most important painter in southern Italy during the later Renaissance. We examine his career and have a thorough look at this little-known but superb work, focusing on how he presents a frequently painted Gospel story of doubt and salvation.
From playlist Let This Be a Lesson
ARTH 2020/4037 15th Century Italian Renaissance Sculpture
Art Historian Dr. Vida Hull ETSU Online Programs - http://www.etsu.edu/online Italian Renaissance Art History Survey II
From playlist ETSU: ARTH 4037 Italian Renaissance | CosmoLearning.org Art
👉 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