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How to Use the Unit Circle in Trigonometry
science.howstuffworks.com/math-concepts/unit-circle.htm
A unit circle is an important part of trigonometry and can define right angle relationships known as sine, cosine and tangent.
How Helium Balloons Work
science.howstuffworks.com/helium.htm
Helium balloons tend to fascinate adults and children alike (and it's not just the Donald Duck voice thing, though that is a big draw). Learn all about helium and why it floats!
Can You Solve These SAT Math Problems?
play.howstuffworks.com/quiz/can-you-solve-these-sat-math-problems
The SAT is considered the standard for college entrance. Scoring 800 on the math section can be tough, but can you score 35/35 on our version of the SAT Math? Find out by taking this quiz.
How do riding mowers work?
home.howstuffworks.com/riding-mowers.htm
Riding mowers are ideal for larger lawns -- anything over half an acre. You can learn more about riding mowers from this article.
White Dwarfs Can Shred Planets to Pieces
science.howstuffworks.com/white-dwarfs-shred-planets.htm
So what does that mean for good ol' Earth someday?
How Black Holes Work
science.howstuffworks.com/dictionary/astronomy-terms/black-hole.htm
A black hole occurs when a massive star dies -- its enormous mass implodes and becomes so heavy that it bends space. So how do astronomers detect something that they can't see?
Can You Pass This Math IQ Quiz?
play.howstuffworks.com/quiz/can-you-pass-this-math-iq-quiz
How much of your math skills have you retained since your school days? Are you still acute, or have you become obtuse? Find out now with our quiz!
Can You Ace This SAT Practice Test?
play.howstuffworks.com/quiz/can-you-ace-this-sat-practice-test
How's your algebra and geometry? Can you find the volume of a cone and is four a prime number? What does frankly mean? Put your high school knowledge to the test and see if you can ace this SAT practice test.
How Elumens Vision Station Works
computer.howstuffworks.com/elumens.htm
The next generation in computer displays gives you a full 180-degree field of view. Learn how the Elumens display works!
If You Think Jupiter Orbits the Sun, You're Mistaken
science.howstuffworks.com/jupiter-orbit-sun-barycenter.htm
Technically Jupiter does not orbit the sun's center. Learn more about Jupiter orbiting the sun in this HowStuffWorks Now article.