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Learn to define: square: In this video by Christian Spannagel, you'll learn how to define the term "square."
spektrum.de/video/christian-spannagel-definieren-lernen-quadrat/2321188
Learn to define: square
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Introduction to Trigonometry: Today's topic in the Β»Christian SpannagelΒ« video: Trigonometry (sine, cosine, tangent).
spektrum.de/video/christian-spannagel-einfuehrung-in-trigonometrie/2335492
Introduction to Trigonometry
Proof using a tangent quadrilateral: Today's topic in the "Christian Spannagel" video: Proof using a tangent quadrilateral.
spektrum.de/video/christian-spannagel-beweis-im-tangentenviereck/2334531
Proof using a tangent quadrilateral
Tasks in egg cartons: Today's topic in the Β»Christian SpannagelΒ« video: Place value systems.
spektrum.de/video/christian-spannagel-aufgaben-in-eierkartons/2325649
Tasks in egg cartons
Bowling sequence: This video by Β»Christian SpannagelΒ« is about number sequences.
spektrum.de/video/christian-spannagel-bowlingfolge/2322247
Bowling sequence
Learn to define: Quadrilateral and Collinearity: In this video by Β»Christian SpannagelΒ« you learn how to define the terms Β»quadrilateralΒ« and Β»collinearityΒ«.
spektrum.de/video/christian-spannagel-definieren-lernen-viereck-und-kollinearitaet/2321185
Learn to define: Quadrilateral and Collinearity
Point, line, segment: This video by "Christian Spannagel" is about the conventions: point, straight line, line segment.
spektrum.de/video/christian-spannagel-punkt-gerade-strecke/2320939
Point, line, segment
9 times true or false: From prime numbers to square numbers to equilateral triangles: In this video, Christian Spannagel presents a typical exam question.
spektrum.de/video/christian-spannagel-9-mal-wahr-oder-falsch/2315117
9 times true or false
The number sequence 5, -15, 45, -135, 405: How do you express a number sequence in recursive or closed form?
spektrum.de/video/christian-spannagel-die-zahlenfolge-5-15-45-135-405/2314130
The number sequence 5, -15, 45, -135, 405
The Euler line in GeoGebra: Today's topic in the Β»Christian SpannagelΒ« video: We construct the Euler line in GeoGebra.
spektrum.de/video/christian-spannagel-die-euler-gerade-in-geogebra/2308322
The Euler line in GeoGebra
Function graphs in GeoGebra: Today's topic: We'll analyze quadratic functions in GeoGebra and examine different forms of representation.
spektrum.de/video/christian-spannagel-funkionsgraphen-in-geogebra/2308127
Function graphs in GeoGebra
Higher eyes count: Today's topic: Chance and probabilities
spektrum.de/video/christian-spannagel-die-hoeheren-augen-zaehlen/2306564
Higher eyes count
Mulled wine functions: Today's topic: Functional relationships
spektrum.de/video/christian-spannagel-gluehwein-funktionen/2301892
Mulled wine functions
Conversion between place value systems: How do you convert numbers between different place value systems?
spektrum.de/video/christian-spannagel-umrechnung-zwischen-stellenwertsystemen/2297289
Conversion between place value systems
Just a little bit: How are decimal numbers converted to binary?
spektrum.de/video/christian-spannagel-just-a-little-bit/2297020
Just a little bit
We define the term rhombus: In this video, Christian Spannagel examines what constitutes a rhombus from a mathematical perspective.
spektrum.de/video/christian-spannagel-wir-definieren-den-begriff-raute/2294252
We define the term rhombus
The House of Quadrilaterals: In this video, Christian Spannagel uses the House of Quadrilaterals to derive a system of concepts.
spektrum.de/video/christian-spannagel-das-haus-der-vierecke/2293255
The House of Quadrilaterals
Solutions to Smart Squares: In this video, Christian Spannagel shows how to find patterns and structures with squares.
spektrum.de/video/christian-spannagel-loesungsansaetze-zu-smarten-quadraten/2292979
Solutions to Smart Squares
Smart Squares task: πŸ§‘β€πŸ«Today's topic: Smart Squares
spektrum.de/video/christian-spannagel-aufgabe-zu-smarten-quadraten/2291514
Smart Squares task
Patterns and structures: square numbers: Why is the sum of the first n odd natural numbers a square number? Christian Spannagel explains this in this video.
spektrum.de/video/muster-und-strukturen-quadratzahlen/2264857
Patterns and structures: square numbers