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Adjacent Angles: Types and Examples
science.howstuffworks.com/math-concepts/adjacent-angles.htm
Adjacent angles are one of the earliest and most important concepts to learn in basic geometry, as they have applications in further subjects like trigonometry, physics, and engineering. Effective students of geometry should be able to identify adjacent angles on sight and calculate them to a great degree of accuracy without a protractor.
What Is a Linear Pair of Angles in Geometry?
science.howstuffworks.com/math-concepts/linear-pair.htm
In the subjects of geometry and trigonometry, a linear pair of angles is any two adjacent angles formed together to add up to 180°, or Pi radians.
How to Use the Mnemonic 'SOHCAHTOA' in Trigonometry
science.howstuffworks.com/math-concepts/sohcahtoa.htm
The mnemonic device SOHCAHTOA helps budding mathematicians remember the trigonometric functions sine (sin), cosine (cos) and tangent (tan), which they need to solve for triangles' missing sides and angles.
Rhombus Properties and Perimeter Formula
science.howstuffworks.com/math-concepts/rhombus.htm
A rhombus is a parallelogram shape with two pairs of parallel sides and four equal sides. These four sides of equal length also define the rhombus as an equilateral quadrilateral. Etymologically, the name of this shape stems from the Greek word "rhombos," which roughly translates to "spinning top."
How do you pick the fastest lane to drive in?
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When you've got to get somewhere, it's easy to make some rash decisions. Learn if switching lanes is a reliable one decision at HowStuffWorks.
How Autofocus Cameras Work
electronics.howstuffworks.com/autofocus.htm
Ever wonder how your camera knows what you're looking at? Understand how autofocus cameras lock on to the object you're photographing!
How Combination Locks Work
home.howstuffworks.com/home-improvement/home-diy/combination-lock.htm
Combination locks use wheel packs to set the combination inside the lock. Learn about combination locks and see pictures of the inside of a combination lock.
What Are Supplementary Angles?
science.howstuffworks.com/math-concepts/supplementary-angles.htm
You've probably seen supplementary angles examples in your everyday life without knowing it. Whether you pass a leaning sign on a flat highway or walk by a shed with a lean-to roof - whenever two angles combine to form a straight, linear pair, there they are.
30-60-90 Triangle: 4 Facts to Remember for Your Next Test
science.howstuffworks.com/math-concepts/30-60-90-triangle.htm
Anyone who's ever faced mind-numbing trigonometry problems and practice questions will be familiar with the Pythagorean Theorem and its square root principles in the 30-60-90 triangle. This special triangle has several short-cut rules to help new mathematicians find interior angles and linear lengths quickly.
Why don't water towers freeze solid in the winter?
science.howstuffworks.com/engineering/structural/water-tower-freeze.htm
Does a water tower freeze in the winter? Learn about water towers in this article.