Education Forum
Forum Thread: How to Use to Trig to Find Height of an Object
Word problems solved using trigonometry. Trig can be used to find length,width,angles, and many more measurements of shapes and objects. The video solves the following word problem.
Forum Thread: How to Find the Angle of Elevation and Depression.
Angle of elevation and depression word problems The video reviews how you can use trigonometry in order to find the angle of elevation and depression.
Forum Thread: How to Classify Fractions.
Short video covering different types of fractions.
Forum Thread: How to Factor Trinomials in Algebra
Factoring a trinomial-In Algebra a trinomial is a polynomial with three terms. Use this method I call the "rainbow method" to help with your factoring.
Forum Thread: How to Find the Radius of a Sphere from the Volume
The video reviews how to find the radius of a sphere given the volume. The question that is solved is,
Forum Thread: How to Find the Volume of a Cone and Cylinder
In this demonstration I show how the volume of a cone is 1/3 the volume of a cylinder. Video: .
Forum Thread: How to Divide Exponents
Exponent Rules Dividing Exponents with like bases There are two rules to remember when you are dividing exponents with like bases.
Forum Thread: How to Identify Similar Triangles
Properties of similar triangles Triangles are similar if they have the same shape,but not necessarily the same size.
Forum Thread: Focusing the Power of an Explosion - Shaped Charges Explained
A shaped charge is a device capable of focusing the energy of an explosion in one point, this makes it capable of piercing many inches of steel.
Forum Thread: Do We Only Use 10% of Our Brain? - Conscious and Subconscious
Do we only use 10% of our brain? This myth establishes that most of the human brain is unused, suggesting that we only use a small portion of it and because of this some kind of secret power can be unleashed, turning us into superheroes able to use telekinesis, telepathy and so on.
Forum Thread: How to Find Area of Triangle Without an Altitude
Heron's formula is used to find the area of a triangle when the altitude is not known. The first part of Heon's formula is calculating "S" The next step is to take "S" and plug it into the area formula. The video works out an example problem. Heron's formula looks complicated but is is really pretty easy to use.
Forum Thread: How to Save Time with Fractions Using Shortcuts
Use these proven fraction shortcuts to save time and increase your understanding of fractions. 7 shortcuts for solving fractions in record time
Forum Thread: How to Make Goo
Learn to make "Goo" with just a couple of household ingredients!!
Forum Thread: How to Save Time with Math Shortcuts
The four shortcuts are, multiplying a number by eleven, squaring a two digit number ending in five,
Forum Thread: How to Divide with Rational Exponents
Example problems dividing rational exponents. (fractional exponents) The video covers the rules for dividing fractional exponents. Fractional exponents are also called rational exponents.
Forum Thread: How to Use the Distributive Property in Math
This video shows how to simplify algebraic expressions using the distributive property. The example problems are 4(x+3) -2x
Forum Thread: How to Divide by 9 Effortlessly
Use this shortcut to divide any number by 9 easily. Using this Math trick you divide any number by nine much easier than the traditional method.. The video works five examples.
Forum Thread: How to Empty Your Bottles Really Fast!
with this simple method you can empty your bottles really really quickly
Forum Thread: How to Learn to Divide an Alternative Way.
If you need another method to learn how to divide then check out this video. This method involves using round numbers and subtraction in order to help you divide.
Forum Thread: How to Find the Vertex Angle of an Isosceles Triangle
The vertex angle of an isosceles triangle is the non congruent angle and is opposite the base The video describes the vertex angle and works two sample problems
Forum Thread: How to Memorize the Unit Circle
In this video you will learn.... How to use your hand to remember the unit circle.
Forum Thread: How to Multiply Complex Numbers.
How to multiply complex numbers (numbers with i) 0:20 (-4)^i After multiplying the complex numbers you then use the patterns of i
Forum Thread: How to Find the Height of a Cylinder
Directions for finding the height of a cylinder given the volume The sample problem is
Forum Thread: How to Divide Rational Exponents.
Example problems dividing rational exponents. (fractional exponents) The video covers the rules for dividing fractional exponents. Fractional exponents are also called rational exponents.
Forum Thread: How to Find the Slant Height of a Pyramid
The slant height is used to find the total surface area of a pyramid. The slant height is not the height of the pyramid. This video describes how to find the slant height of a pyramid.
Forum Thread: How to Find Sector Area and Arc Length in Radians
Finding arc length and sector area using radians 0:00 Review of converting degrees to radians and radians to degrees
Forum Thread: How to Tutorial on Recovering Gold from Aqua Regia Solution
I cannot recover gold back from my Aqua regia solution. Can anyone help guide me on which chemical to use for recoering gold from computer parts dissolved in Aqua Regia solution.
Forum Thread: How to Multiply Two Digit Numbers Quickly
Learn how to multiply two digit numbers in your head. This short cut teaches you to round the numbers to the closes ten so and then multiplying. As a result you have nice easy numbers that you can then add together for the answer.
Forum Thread: How to Determine if an Equation Is Direct or Inverse Variation.
Is the equation m=5p or c=p/-4 a direct variation or an indirect variation. The video explains how to tell the difference. A chart is provided that helps you classify the equations along with sample problems.
Forum Thread: How to Determine if a Line Is Perpendicular.
What are perpendicular lines or what is perpendicular? Well perpendicular are two lines that intersect at 90 degree angles. So let's look at a couple of examples of where we will see those. So we have two lines and they are intersecting at 90 degree angles, and I will label it with a little box that represents 90 degrees, and once we know this is 90 degrees we know the other three are 90 degrees because these are lines and lines have a degree of 180 so that would make all four of these 90 deg...
Forum Thread: Coca Cola and Pool Chlorine
Watch this strange chemical reaction - Coca Cola and Pool Chlorine
Forum Thread: How to Find the Side Length of an Isosceles Triangle
Directions for finding the side length of an isosceles triangle. Find the length of side a of an isosceles triangle with a height of 10 and a base of 8.
Forum Thread: How to Work with Absolute Value
Absolute value explained The absolute value of a number is its distance from zero. Absolute value is written with the following symbol | x | .
Forum Thread: How to Multiply 2 and 3 Digit Numbers Fast
Use this method to multiply 2 and 3 numbers quickly. With practice you can almost multiply faster than your calculator, and can save you time on a test.
Forum Thread: The Doppler Effect Equation Is Incorrect
Ignore the following paragraph if you know how the doppler effect works mathematically.
Forum Thread: How to Multiply Using Lines
I have seen this technique described as "Chinese Multiplication", Japanese Multiplication", Vedic Math Multiplication, and even "Ancient Arabic Multiplication". It is a fun way to multiply numbers using lines. I don't know if you can replace traditional forms of multiplication with this technique, but it does work on all numbers.
Forum Thread: How to Multiply Using Your Hands
Times table tricks Use your hands to multiply 6,7,8, 9, and 10's. It is easy, and an alternative to times tables.
Forum Thread: How to Find the Area of a Triangle on a Coordinate Plane.
How do you find the area of a triangle when you don't have a right angle or an altitude?. You can use the coordinates in order to find the area of the triangle.