TED-Ed
TED-ED: The mathematics of sidewalk illusions - Fumiko Futamura
Have you ever come across an oddly stretched image on the sidewalk, only to find that it looks remarkably realistic if you stand in exactly the right spot? These sidewalk illusions employ a technique called anamorphosis - a special case...
3Blue1Brown
Ever wondered why slicing a cone gives an ellipse? It’s wonderfully clever!
A beautiful proof of why slicing a cone gives an ellipse.
TED-Ed
TED-ED: How many ways are there to prove the Pythagorean theorem? - Betty Fei
What do Euclid, 12-year-old Einstein, and American President James Garfield have in common? They all came up with elegant proofs for the famous Pythagorean theorem, one of the most fundamental rules of geometry and the basis for...
TED-Ed
TED-Ed: Can you solve the Alice in Wonderland riddle? | Alex Gendler
After many adventures in Wonderland, Alice has once again found herself in the court of the temperamental Queen of Hearts. She's about to pass through the garden undetected, when she overhears the king and queen arguing that 64 is the...
SciShow
Thalidomide: The Chemistry Mistake That Killed Thousands of Babies
On October 1, 1957, thalidomide was introduced as a new morning sickness cure. Everything seemed great until later the next year, when thousands of infants were born with severe birth defects.
Bozeman Science
Resistors and Capacitors
In this video Paul Andersen explains how resistors and capacitors affect circuits. The resistance of a resistor is affected by the resistivity of the material and the geometry of the resistor. The current through a resistor can be...
TED-Ed
TED-Ed: Daniel Finkel: Can you solve the unstoppable blob riddle?
A shooting star crashes onto Earth and a hideous blob emerges. It creeps and leaps, it glides and slides. It's also unstoppable: no matter what you throw at it, it just re-grows and continues its rampage. The only way to save the planet...
PBS
What Happens At The Edge Of The Universe?
Lots of people believe the Universe is infinite, but there's a good possibility that might not be the case. Which means that there would be an actual edge of the Universe. What happens at that edge? Is there a restaurant?
TED-Ed
TED-ED: How the K_nigsberg bridge problem changed mathematics - Dan Van der Vieren
You'd have a hard time finding the medieval city K_nigsberg on any modern maps, but one particular quirk in its geography has made it one of the most famous cities in mathematics. Dan Van der Vieren explains how grappling with...
TED-Ed
TED-Ed: What is a vector? - David Huynh
Physicists, air traffic controllers, and video game creators all have at least one thing in common: vectors. But what exactly are they, and why do they matter? David Huynh explains how vectors are a prime example of the elegance, beauty,...
TED-Ed
TED-Ed: Euclid's puzzling parallel postulate - Jeff Dekofsky
Euclid, known as the "Father of Geometry," developed several of modern geometry's most enduring theorems--but what can we make of his mysterious fifth postulate, the parallel postulate? Jeff Dekofsky shows us how mathematical minds have...
TED-Ed
TED-Ed: How taking a bath led to Archimedes' principle - Mark Salata
Stories of discovery and invention often begin with a problem that needs solving. Summoned by the king to investigate a suspicious goldsmith, the early Greek mathematician Archimedes stumbles on the principle that would make him famous.
PBS
Was Math Invented for Money? (Ficycle Collab)
New ReviewA common complaint that math teachers hear is, "When am I going to need this in the real world?" When you're sitting in algebra class, it's easy to feel like it's all theoretical–a bunch of imaginary numbers and rules dreamed up by...
Curated Video
Liv Intrigue Review - 2019 Bible of Bike Tests
The Liv Intrigue surprised testers with its versatility, earning high marks on both our cross country and gravity test tracks. Giant’s buttery maestro platform, paired with blingy new DVO suspension helped it shine. With a full range of...
Curated Video
Ibis Ripmo Review - 2019 Bible of Bike Tests
The Ripmo embodies the term “hover bike.” It floated up rough climbs, indifferent to pedal input. Likewise, it swallowed our chunky descents while still maintaining more pop than a long-travel 29er should. That once niche category is...
Curated Video
Kona Process 153 29 Review - 2019 Bible of Bike Tests
Hate knowing what line to take then fighting your bike to get through it? Kona’s Process 153 29 solves line choice ambivalence, entirely. With telepathy. Which is amazing.
Curated Video
OTD In Space - June 10: Classic Curved Space Lecture Spoken
On June 10, 1854, Georg Friedrich Bernhard Riemann gave his classic lecture on curved space. Riemann was a 19th century mathematician from Germany. His landmark lecture included a workable definition of how someone might measure the...
Curated Video
Simplifying Radical Expressions VIDEO 1
How to simplify when you add, subtract, or multiply radical expressions
Curated Video
SImplifying Radicals with Division (VIDEO 2)
This video discusses how to simplify radical expressions involving fractions and/or division
Curated Video
Conditional Statements
What is a conditional statement, and how (from that conditional statement) do you create a converse, inverse, and contrapositive?
Curated Video
Dilations from a Non-Origin Center
In this video, we will dilate figures on the coordinate plane when the center of dilation is not the origin. The first example is a standard dilation (enlargement) with a non-origin center, and the second example gives you both the...
Curated Video
Dilations from the Origin
In this video, we learn how to dilate figures from the origin. We do one example that is an ENLARGEMENT (has a scale factor greater than 1), and another example that is a REDUCTION (scale factor that is between 0 and 1).
Curated Video
Geometric Mean with Similar Triangles
In this video, we investigate how and why geometric mean can be used to find missing side lengths in certain triangles.