From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve simple percent problems in basic arithmetic.

In this video, Mr. Maisonet provides a quick and easy method for calculating the area of a trapezoid. In the first step, The lengths of the two bases (the two sides of a trapezoid that are parallel to one another) are averaged. The lengths of the bases are first added together, and the sum is divided by two, yielding the average. The average is then multiplied by the height. The resulting product is the area of the trapezoid. This method for finding the area of a trapezoid is mathematically s...

This helpful video gives simple step by step instructions on how to find area and volume of prisms. To find the area of a prism you must first find the area of the base, it may be rectangular, triangular, or otherwise. You must then multiply the area of the base times the height. Examples of all types of scenarios are given to better explain the method of finding the area. To find the volume of a triangular prism you must first find the area of the base. The next step is multiplying the area ...

To make a Paper Orchid you need to know the steps as follows: First fold a square sheet of origami stock paper into a triangle, bringing both points together. Use this as your flower base. Fold the paper again bringing both corners together. Rub your finger along the crease of the fold to make sure that it stays put. This step completes the triangle base. Begin making the flower base by taking the triangle base folded over twice and adding a third piece, folding it over as well to meet with t...

This video starts out with a basic view of a rectangle and its dimensions. The base is 7 inches while the sides are 4 inches. It then displays the formula for finding the perimeter of the rectangle which is the addition of both bases and both sides. After the substitution of the values into the formula you can quickly come up with the perimeter. Then moving on the area, the formula is the base multiplied by the side. In this case, the base being 7 inches and the side being 4 inches you come o...

A mason jar is a great way to preserve your food, but did you know that you could use a mason jar with a blender?

This how-to video is not for church-going makeup; the makeup look demonstrated is based on the deadly sin of wrath, and is as intensely theatrical as it sounds. The cosmetic products used to create this look are MAC's Full Coverage Foundation, Select Moisture Cover Concealer, Blot Powder, & Peach Invisible Set, Bat Black Cream Color Base, Black Black Pigment, Bat Black Cream Color Base, Dark Soul, & Softwash Grey Pigments, Burnt Burgundy, & Black Black Pigments, Boot Black Liquid Liner, Bat B...

Not sure what to origami today? Watch these two how to videos to learn how to fold a crow out of origami paper. Give Japanese origami folding a try with this how to video tutorial on folding a crow stating with an origami bird as the base.

Start playing one of the most popular browser based science fiction games DarkOrbit! This tutorial gets you started, showing you how to create an account and choose your faction (Mars, Venus or Earth). Then the basic system is demonstrated, so you can start exploring space!

You can set up a dynamically driven Google Map widget that can display any sort of information - such as displaying a user's location based on what they have entered into their profile. This is a useful and interactive feature for any PHP/MySQL based website.

In this free video chemistry lesson from Salman Khan, we learn how to use acid-base titration to find the mass of oxalic acid. Whether you need help studying for that next big test or could just use a hand finishing your homework, you're sure to be well served by this video lesson. For more information, including detailed, step-by-step instructions, take a look.

In this video, we learn how to install a vanity and sink with Lowe's. A great way to give your bathroom a makeover is to give it a new vanity and sink. First, turn off the water from the water line, then take down the pipes from under the sink. Use a bucket to catch extra water that's falling out. Next, separate the top from the base and then remove the old vanity. Remove the old base unit from the bathroom and then install the new vanity. Measure out the area to make sure it will fit. Place ...

Here's a good tutorial for those who are looking for some easy origami projects. Starting with a water bomb base, this tutorial shows you how to make a four pointed star you can use to decorate binders, scrapbooks or even Christmas trees.

New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 629th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the VLOOKUP, MATCH, DATEDIF, SUMIF, SUMPRODUCT and INT functions to look up salary based the number of relevant years worked.

Looking to add a rare and exotic specimen to your paper garden? Make a paper cherry blossom using origami, the traditional Japanese folk art of paper folding. Specifically, this free video origami lesson demonstrates how to make a cherry blossom taking an origami bird base as a starting point. For more information, and to get started making your own paper sakura, take a look!

Expand your cheesecake horizons by making white chocolate cheesecake the next time your in the mood for a rich and decadent dessert! In this video, learn from Sue McMahon, cookery editor at Woman's Weekly magazine, how to make a delicious white chocolate cheesecake. This cheesecake takes a total time of four hours and thirty minutes to make and you will need the following ingredients:

As you might guess, one of the domains in which Microsoft Excel really excels is business math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 28th installment in his "Excel Business Math" series of free video lessons, you'll learn how to solve for base in a percent formula.

Finding the area of a trapezoid can be done easily by using a simple formula. The area can be found by adding the length of base 1 plus base 2 then multiplying by the height and then dividing the sum by 2. The bases of the trapezoid are the straight lines that are parallel to one another. The last number in the equation is total height of the trapezoid. Now all that remains left is to plug these number into the formula and find the area of your trapezoid.

In this video, they show you how to do French nails with purple and gold tips. The nail polish used for the gold color is Ooh La La. The nail polish used for the purple color is N.Y.C. You also need a clear nail polish for a base coat as well as a skinny brush in order to paint the French nails with it. The base coat used is a Maybelline nail polish. You first apply a base of clear nail polish. Then you apply the purple nail polish to the tips. Using the brush, you apply the gold stripes. Fin...

Whether you've just bought a brand new shiny surfboard, or your current wax job is a grimy, slick mess, here's how to get that perfect grip so you don't slip off.

Learn to make a white and brown roux with Professional Chef Gerald Hirigoyen. Roux is a great thickening base for sauces; just add your own flavorings or seasonings. Learn how to make a white and brown roux sauce by watching this video cooking tutorial.

Learn how to stop check washing with a pigmented gel pen or specifically the Uni Ball 207 Gel Pen instead of a typical dye-based pen. Most Bic ball point pens are dye-based.

Steven Bann shows a chipping drill that teaches distance control through the air. Golf clubs are arranged into "zones" which represent the plates of a baseball field, so golf clubs arranged horizontally and evenly distanced apart from the next golf club. This represents "first base," "second base," "third base" and home plate. This is a landing drill where the object of the drill is to land in the designated "first base" zone and then subsequent bases until you get three-in-a-row for each zon...

Learn how to play a blues based intro to 11th position on harmonica with this tutorial. Pick up your C harmonica and play along in a minor cross harp position (2nd). We're playing in Gm but the music will switch to Bbmaj7. Watch this how to video and you will be able to play a blues based intro to 11th position on harmonica.

Thinking about renovating your bathroom? It's a lot easier than you might think to remodel your bathroom. Find out how to build your own water-tight concrete base for a shower with this tutorial from the DIY network. Watch this how to video and you can build the concrete base to the shower in your bathroom in no time.

Learn how to fold a preliminary base. This will serve as the base for many other origami creations.

Make It Mine associate editor Tea Benduhn shows you how to needle felt to a base. This will let you put a design on the front of your purse or hat or mittens or any other felted base.

If you're looking for your gaming fix and nothing on the App Store is piquing your interest, you should give soft-launched games a try. These are games that haven't been released in the US yet because they're getting tested in smaller markets first. Using a simple workaround, you can install them on your iPhone in any country.

Learn how to solve geometry word problems. For example, how would you solve the following problem?

Looking a for a secure and secretive entryway to your Minecraft base? Check out this video to learn a great design that uses pistons to make a trap door. With this trap door you can control who gets into your base, and who gets sent to the lava pit.

So you're suiting up for a heroic instance in World of Warcraft, and you're playing an agility or DPS based character - what's the best gear to get? This video shows you all the best gear that doesn't come from loot drops.

A ternary operator lets you smooth out your Python based program. This video shows you precisely how one works, why it's a good thing and how you can incorporate a ternary operator to your own Python based computer programming projects.

Make sure you have piles and piles of dirt before you start this project! Not for a beginner at Minecraft, this tutorial shows you how to build your own underwater base. All you have to do is drop dirt and stone into the water, and then hollow it out.

If you don't know the right way through, it can be difficult to make your way onto Nellis Air Force Base in Fallout: New Vegas. This video shows you how you can avoid all the heavy artillery and boomers to get to the AFB.

As you might guess, one of the domains in which Microsoft Excel really excels is finance math. Brush up on the stuff for your next or current job with this how-to. In this tutorial from everyone's favorite digital spreadsheet guru, YouTube's ExcelIsFun, the 61st installment in his "Excel Finance Class" series of free video lessons, you'll learn how to calculate the value of a stock based on the present value of a future dividend cash flow.

In this tutorial we learn how to take an acid and base to make salt. To start, you will first need to take an acid of your choice, this can be something like vinegar. After this, you will combine the acid with a base and then wait for it to react. Once it starts to react, gases will release from them and you will end up with some salt! Be sure to put a cap on the container while the reaction is happening. This will allow the reactions to come together and the gases to react. Have fun and do t...

This free video science lesson from YouTube's mrhomescientist demonstrates a simple technique for doing acid-base titration. For all of the relevant details and detailed, step-by-step instructions, as well as to get started trying this experiment yourself, watch this home-science how-to.

In this video we learn how to decorate a ceramic lamp base with Simon Leach. First, grab a small paint brush and then apply paint to it. Once you have this, start to paint your chosen design onto the pot. Painting a leaf or a plant will be the most appropriate for a large jar or lamp base. Use a brush that will move along the pot and create unique lines. Go all around the pot until your design is finished. Let this dry and then rinse your pot off when you are done. Let your personality shine ...

In this video, we learn how to find the area of a trapezoid. The formula to figure out how to find the answer is: Area= 1/2x (base1 x base2) x height. Now, find the bases and the height of the trapezoid. Remember that the height must always be perpendicular to the bases. Once you have found these, add the bases and multiply by the height. You can use a calculator to do this or do it off hand if you're good with math. For the third step, divide the answer by 2 and then write down the answers w...

In this tutorial, we learn how to draw a parallelogram given base, angle & altitude. First, you will draw the base of the parallelogram, using your ruler to measure out the line. Next, you will draw a dotted line perpendicular to the line that you just drew that is 3 cm in length. Then, you will draw another dotted line on top of the one you just drew. This dotted line shows where the top of your parallelogram will be. Then take your protractor and draw it at the angle the problem gives you. ...