In November 1095 the Pope, Urban II, held a speech at the Council of Clermont, calling for a war of liberation.
The war was to be waged by volunteers who vowed to fight.
By calling all Christians to war against the Muslims, so that they could help defend the Byzantine empire and potentially reclaim the Holy Land, he gave rise to the Crusades.

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Credit:
Created by Daniel Turner

Narrator:

Lucas Webley

Music Credit:
'Agnus Dei X - Bitter Suite' and 'Crusade - Video Classica' by Kevin MacLeod is licensed under a Creative Commons Attribution licence (https://creativecommons.org/licenses/by/4.0/)
Source: http://www.amazon.com/Agnus-Dei-X/dp/B00QGC7W3Y
Artist: http://incompetech.com/

Sources:

God's War: A New History of the Crusades by Christopher Tyerman

The Crusades: A History by Jonathan Riley-Smith

A Short History of the Middle Ages Paperback
by Barbara H. Rosenwein

History of the Crusades by Steven Runciman

Christianity: A Global History By David Chidester

The Sepulchre of Christ and the Medieval West: From the Beginning to 1600 by Colin Morris

The Middle Ages By Morris Bishop

POPE URBAN II'S PREACHING OF THE FIRST CRUSADE
H. E. J. COWDREY
Vol. 55, No. 184 (1970), pp. 177-188

Enlargement from a centre by a certain scale factor, built from scratch in less than one minute.

I'm using Geogebra Classic 5 on a PC, but this will work similarly on the mobile app, or in a browser.

In the US this is often called dilation rather than enlargement, and the command in US versions is actually 'dilate': https://wiki.geogebra.org/en/Dilate_Command

Are you one of those people that always has 47+ tabs open in their browser?
Turn those tabs into humanitarian support for Ukrainian families with
Tab for Ukraine: https://tab.gladly.io/ukraine/simplehistory/

The Antonov 225, once the largest aircraft in the world, the heaviest aircraft ever built and with the largest wingspan, now rests in pieces at the Hostomel airport near Kyiv. It was built as a carrier for the Soviet space craft Buran, it had survived the dissolution of Soviet Union, storage time, repairs and refurbishment, financial difficulties and problems and would serve for many years, carrying huge objects, machines and cargo only to end its career as a victim of battle that took place around it.

Become a Simple History member: https://www.youtube.com/simplehistory/join
Support us on Patreon: https://www.patreon.com/simplehistory

Copyright: DO NOT translate and re-upload our content on Youtube or other social media.

SIMPLE HISTORY MERCHANDISE

Get the Simple History books on Amazon:

https://www.amazon.com/Daniel-....Turner-%60/e/B00H5TY

T-Shirts

https://teespring.com/stores/s....imple-history-offici

Simple history gives you the facts, simple!

See the book collection here:

Amazon USA

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http://www.amazon.co.uk/Daniel....-Turner/e/B00H5TYLAE


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Credit:
Created by Daniel Turner (B.A. (Hons) in History, University College London)
Script: Conan White
Narrator:

Chris Kane
https://vocalforge.com/

Books
Energiya-Buran: The Soviet Space Shuttle By Bart Hendrickx, Bert Vis
Mega Machines: Roar into action with these super-charged racers! By Paul Harrison

Big Wings: The Largest Aeroplanes Ever Built By Philip Kaplan

Soviet Life, Issues 7-12

What is GeoGebra? How can it help teachers empower their students to learn math in remote settings?

This lesson explains how to compare fractions with the same numerator. For more videos and instructional resources, visit TenMarks.com. TenMarks is a standards-based program to complement any math curriculum with scaffolded lessons, guided practice, inquiry-based tasks, assessments and interventions.

#mean #median #mode

Austria-Hungary. Ottoman empire. British, German, French and Russian empires.

Watch the next lesson: https://www.khanacademy.org/hu....manities/world-histo

Missed the previous lesson? https://www.khanacademy.org/hu....manities/world-histo

World history on Khan Academy: Called the Great War (before World War II came about), World War I was the bloody wake-up call that humanity was entering into a new stage of civilization. Really the defining conflict that took Europe from 19th Century Imperial states that saw heroism in war into a modern shape. Unfortunately, it had to go through World War II as well (that some would argue was due to imbalances created by World War I).

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s World History channel: https://www.youtube.com/channe....l/UC6KRvvmvkCchFMo2E
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/hu....manities/world-histo

Why is Mesopotamia considered the "cradle of civilization"? Sal explains the history of the early empires on the Tigris and Euphrates rivers.

Practice this yourself on Khan Academy right now: https://www.khanacademy.org/wo....rld-history/e/mesopo

Watch the next lesson: https://www.khanacademy.org/hu....manities/world-histo

World History on Khan Academy: From prehistory to today, this course covers the human events that have shaped our planet.


About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to KhanAcademy: https://www.youtube.com/subscr....iption_center?add_us

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/calculus-all-old/

More free lessons at: http://www.khanacademy.org/video?v=Mci8Cuik_Gw

More Lessons: http://www.MathAndScience.com
Twitter: https://twitter.com/JasonGibsonMath


In this lesson, you will learn what it means for an equation to be represented in "quadratic form". This means that the equation has the general form of a quadratic function, but the variables may be slightly more complex expressions.

To solve these types of equations, we first perform a substitution where we let the variable "z" represent a part of the equation. The result of this is a classic quadratic equation in "z" that can then be solved and represented in terms of the original variable "x".

In this video, you will learn about the Roman Numerals I, V, & X.

We hope you are enjoying this video! For more in-depth learning, check out Miacademy.co (https://www.parents.miacademy.co/), an online learning platform with lessons and practice games that go along with our videos. Use coupon code VIDEOSPECIAL for a discount. Good for homeschoolers, Parents, Teachers, or anyone with kids in grades K-8.

Miacademy also offers many hands-on learning activities including a business simulation, writing in the Miacademy weekly, and creating artwork. Teaching social skills is also one of the key values at Miacademy. On the site, kids can interact safely in a moderated environment and share their artwork, videos, and ideas with each other.

Learn about how the Senate functions!
We hope you are enjoying our large selection of engaging core & elective K-12 learning videos. New videos are added all the time - make sure you come back often to learn more! If you'd like us to cover any additional topics, please let us know. For practice, assessment, and many interactive activities that go along with each video, as well as a teacher/parent dashboard, go to Miacademy.co for Grades K-8 or Miaprep.com for grades 9-12!

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/ma....th/cc-fourth-grade-m

Let's use our virtual protractor to measure some angles together, shall we?

Watch the next lesson: https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/Angle_basics/v/measuring-angles?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

Missed the previous lesson?
https://www.khanacademy.org/math/geometry/parallel-and-perpendicular-lines/Angle_basics/v/measuring-angles-in-degrees?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry

Geometry on Khan Academy: We are surrounded by space. And that space contains lots of things. And these things have shapes. In geometry we are concerned with the nature of these shapes, how we define them, and what they teach us about the world at large--from math to architecture to biology to astronomy (and everything in between). Learning geometry is about more than just taking your medicine ("It's good for you!"), it's at the core of everything that exists--including you. Having said all that, some of the specific topics we'll cover include angles, intersecting lines, right triangles, perimeter, area, volume, circles, triangles, quadrilaterals, analytic geometry, and geometric constructions. Wow. That's a lot. To summarize: it's difficult to imagine any area of math that is more widely used than geometry.

About Khan Academy: Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computer programming, history, art history, economics, and more. Our math missions guide learners from kindergarten to calculus using state-of-the-art, adaptive technology that identifies strengths and learning gaps. We've also partnered with institutions like NASA, The Museum of Modern Art, The California Academy of Sciences, and MIT to offer specialized content.

For free. For everyone. Forever. #YouCanLearnAnything

Subscribe to Khan Academy’s Geometry channel:
https://www.youtube.com/channe....l/UCD3OtKxPRUFw8kzYl
Subscribe to Khan Academy: https://www.youtube.com/subscr....iption_center?add_us

This reading lesson is specially created for kids. It will help kids to enhance their reading ability and comprehension.

#MERMAID
#EnglishReadingLesson
#PracticeReading
#ShortStoryforKids
#ShortStorywithQuestions
#ReadingComprehension
#ReadingTutorialforKIds
#ReadingLEssonforGrade1
#ReadingLEssonforGrade3
#ReadingLEssonforGrade2

Hi Numberblock fans,
Today we are going to explore the numberblock 1 - 20 wipe clean activity book.
If you've enjoyed todays video please like subscribe and click the bell icon for notifications of new videos.

Missing Number | Mental Ability | By Ningappa A.H | #shorts #short #shortvideo #shortsvideo

ಸರಳ ವಿಧಾನದಲ್ಲಿ ಮೆಂಟಲ್ ಎಬಿಲಿಟಿ ಕಲಿಯಿರಿ (Simple Mental Ability)
#ningappa_academy #numberseries #numbers #reasoning #reasoningquestions #reasoningtricks
#mentalability

one-line method on mental ability

Coming soon with new concepts and problems
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Let's learn about matter, atoms, and elements!
We hope you are enjoying our large selection of engaging core & elective K-12 learning videos. New videos are added all the time - make sure you come back often to learn more! If you'd like us to cover any additional topics, please let us know. For practice, assessment, and many interactive activities that go along with each video, as well as a teacher/parent dashboard, go to Miacademy.co for Grades K-8 or Miaprep.com for grades 9-12!