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How To: Calculate the area of a triangle by formula

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 free math tutorial, you'll learn how to calculate the area of a triangle by formula.

How To: Use the Pen Tool in Adobe Photoshop CS4 or CS5

Need to make a very precise selection in Adobe Photoshop? This Photoshop user's guide presents a general introduction to the Pen Tool. Whether you're new to Adobe's popular raster graphics editing software or a seasoned professional just looking to better acquaint yourself with the program and its various features and filters, you're sure to be well served by this video tutorial. For more information, including detailed, step-by-step instructions, watch this free video guide.

How To: Find the equation of trig functions by their graphs

Need to know how to determine the equations of trigonmetric functions by inspecting their graphs? Learn how. Learn how to use trigonometric functions to calculate the sides of a right triangle. Need to know how to solve a matrix-form linear equation in algebra? 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 (or just f...

How To: Using the magnetic lasso in Photoshop

Meet Photoshop's Magnetic Lasso Tool! The Magnetic Lasso Tool is probably the best out of three Lasso tools for it allows precise and quick freehand selections. hether you're new to Adobe's popular image editing software or simply looking to pick up a few new tips and tricks, you're sure to benefit from this free video tutorial. For more information, including a thorough overview of the magnetic lasso tool, watch this graphic designer's guide.

How To: Create a savings plan with Excel's FV & PMT functions

Whether you're interested in learning Microsoft Excel from the bottom up or just looking to pick up a few tips and tricks, you're in the right place. In this tutorial from everyone's favorite digital spreadsheet guru, ExcelIsFun, the 22nd installment in his "Highline Excel Class" series of free video Excel lessons, you'll see a lifetime savings plan using the FV and PMT functions and other formulas. See how to calculate how much you will have at retirement from a basic savings plan. Then see ...

How To: Calculate variable commission totals in MS Exce

Love Microsoft Excel? This clip contains a tip that just might induce you to. With this free video tutorial from ExcelIsFun, the 46th installment of his "YouTubers Love Excel" or YTLE series of free video MS Excel lessons, you'll learn how to use the DOLLAR, VLOOKUP, INDEX and MATCH functions and a previous bracket commission formula trick to calculate total commissions when you have variable commissions paid out. Learn to love digital spreadsheets more perfectly with the tricks outlined in t...

How To: Use Heron's formula

Area of a triangle can be calculated when you have the length of its base and height. In this case the area is 1/2 times the base and its height. If you do not know the height of the triangle but know the lengths of all the sides of the triangle then you can calculate its area using the Herons formula. First to use it you need to computer the semi perimeter of the triangle S, which is S = (a + b + c)/2, where a, b, c are the lengths of the sides of the triangle. Now the area of the triangle i...

How To: Calculate probability in an Excel pivot table

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 55th installment in their series of digital spreadsheet magic tricks, you'll learn how to calculate probabilities with a pivot table (PivotTable). Specifically, you'll learn how to find joint, marginal and conditional probabilities.

How To: Calculate volume and area in Revit

This video illustrate us how to calculate volume and area in Revit. Here are the following steps: Step 1: First of all open the programme Revit and then click on the volume and area on the left hand side, if in case its not there then right click in the gray bar and then various attributes appear, choose from here.

How To: Do date calculations in Microsoft Excel

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 12th installment in their series of digital spreadsheet magic tricks, you'll learn how to calculate the time between 2 dates like invoices past due. Learn how to calculate a loan due date or how many days you have been alive!

How To: Calculate the circumference of a circle

This video shows how to calculate the circumference of a given circle. The video first describes the circumference or perimeter of a circle as the distance around the outside of a circle. To find the circumference we need either the radius or the diameter of the circle. When you know the diameter of the circle, the formula to find the circumference denoted by 'C' is 'pi' times the diameter, where 'd' is the diameter and 'pi' is a constant, the approximate value being 3.14. And when you are gi...

How To: Calculate the age of the universe w/ Hubble's constant

This is a great instructional video on how to calculate the age of Universe from Hubble's constant. The speed the galaxy moves away from us is directly proportional to the distance from us. Now think of big bang theory. Hubble's constant is equal to velocity over distance. 1 over Hubble's constant is equal to distance over velocity that is equal to time. Time equals to 1over 71. If you change it into all the same units words it is one over 71000 or 3.09x 10 to the power of 22. It is 3.09x10 t...

How To: Find the area of a trapezoid

Get help with your math homework and learn to find the area of a trapezoid by watching this video. Following along while four examples are solved, the viewer will learn how to calculate the area when all the required measurements are given and will learn to calculate distance of one side when the area of the trapezoid is known. If you are learning about measurement in school or are trying to find the areas of a trapezoid for another reason (maybe you are carpeting an oddly shaped room), this ...

How To: Field dress a deer using only a knife

So you shot a deer, now what? Time to field dress the animal and make the most of your prize. Throughout the process it is important to keep your incisions precise, so as to avoid any messy mistakes. This instructional video will also teach you how to tell the age of the deer by the condition of its teeth.

How To: Make the perfect duct tape wallet

Learn the magical powers of duct tape! You can do just about anything with duct tape! This video tutorial will show you how to make the perfect duct tape wallet. To make this duct tape wallet, you'll need some duct tape, an X-Acto knife (or Exacto knife) or scissors, and a ruler. You'll need to make some reasonably precise measurements to make your money fit right.

How To: Wash your hair scientifically (and perfectly)

It's no joke: British researchers spent six months shampooing 500 volunteers until they perfected the precise technique for lustrous locks. Learn how to wash your hair perfectly. You will need a shower, a thermometer, shampoo, measuring spoons, a stopwatch, conditioner, a wide toothed comb, and a towel.

How To: Remember and recite pi to eight decimal places

Looking for an easy way to impress the math geeks in your life? This brief clip from the BBC will help you memorize pi to eight decimal places without breaking a sweat through use of a simple mnemonic device: "How I wish I could calculate pi easily today." (Hint: Count the number of letters in each word.) Easy as pi(e).

How To: Calculate the difference between two dates in Microsoft Excel 2010

Learn how to find the difference between two dates with MS Excel 2010's DATEDIF function. Whether you're new to Microsoft's popular digital spreadsheet application or a seasoned business professional just looking to better acquaint yourself with the Excel 2010 workflow, you're sure to be well served by this video tutorial. For more information, including step-by-step instructions, take a look.

How To: Calculate a limit at infinity with a radical

In this video, we learn how to calculate a limit at infinity with a radical. The idea is to take out the higher power of 'x' in the denominator first. If the x squared is under a radical, take that out so you're left with just 'x'. After this, divide every term by 'x'. Once you are finished with this, you can rewrite the equation. Next, you will use the rules of math to find the answer of the equation. This is hard math to do if you aren't used to it! Make sure you practice with the samples i...

How To: Calculate the volume of a cube in basic geometry

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of any cube.

How To: Calculate the volume of a triangular solid or triangular prism

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a triangular prism.

How To: Calculate the volume of a rectangular solid

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a rectangular solid.

How To: Calculate the surface area of a triangular solid in geometry

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the volume of a prism.

How To: Calculate the surface area of a rectangular solid in basic geometry

With mathematics, as with anything else, not everyone progresses at the same rate. Geometry is no exception. Happily, in the age of Internet video tutorials, this isn't a problem. Those who progress quickly can go beyond what's being taught them and those who are struggling likewise have all the time in the world to catch up. With this free video math lesson, you'll learn how to calculate the surface area of a rectangular solid.

How To: Calculate standard deviation with graphing calculator

This video tutorial is in the Education category which will show you how to calculate standard deviation with TI graphing calculator. First you got to enter the data in to the calculator. Go to stat and click on enter. This will edit a list. Now you type in these numbers: 50, 20, 33, 40 and 55. Then press stat and click on enter. This will bring up the 1-var stats page. Press the "2nd" button and L1, because all our data is in L1. Click on enter and you will get all the data that you will nee...

How To: Calculate hours worked in a shift with a lunchbreak in Microsoft Excel 2010

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 727th installment in their series of digital spreadsheet magic tricks, you'll learn how to calculate the hours worked in a night or day shift with a break for lunch given time number inputs using the MOD function.

How To: Calculate compound interest using a TI-84 and solver

This is a video tutorial in the Electronics category where you are going to learn how to calculate compound interest using a TI-84 and solver. Press the apps button on the calculator and press enter to load the TVM Solver which is the 1st choice. Here the meaning of various notations are N is time, I% is the percentage, PV is present value, PMT is payment, FV is future value and C/Y is compounding period. The problem is find the compound amount and the interest earned on $12,903.45 compounded...

How To: Calculate weekly gross pay from time values in Microsoft Excel 2010

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 722nd installment in their series of digital spreadsheet magic tricks, you'll learn how to calculate gross pay for the week from time values using the SUMPRODUCT function. Also see what to do if you get a #VALUE! error from blanks in cell using the IF function and an array logical test.

How To: Calculate your waist-to-hip ratio

In this video, we learn how to calculate your waist to hip ratio using a tape measure. First, measure your waist round your belly button and write down what number it is. Next, measure your hips around the largest part of your butt, and then write down what number you get for this. After this, divide your waist measurement by your hip measurement. A healthy ratio for women is .8 and under and a healthy ration for men is .95 and under. It's important to watch the weight around your waist, beca...

How To: Calculate days worked on a project in Microsoft Excel

Calculate the amount of days worked on a given project within MS Excel! Do you maintain work schedules for your projects? Are you manually subtracting weekends and holidays from your project estimates? There's a better way. And this digital spreadsheet tutorial will show you how. For detailed, step-by-step overview on how to easily and efficiently maintain a count hours of labor, watch this free video software tutorial.

How To: Read a vernier caliper

A vernier caliper is a great tool to use if you're interested in measuring things externally, internally, and in some cases the depth. It gives you a precise measurement and includes both metric and inch measurements on the upper and lower part of the scale. It's an easy tool to use and can be helpful in certain situations. So sit back and enjoy this tutorial on how to read a vernier caliper. Enjoy!