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Join our Math World now to meet up with other math students and mathematicians on the Web. Learn how to perform basic math functions, and share your own tips and tricks for solving problems and calculating answers for everything math related, from algebra to geometry to trigonometry to advanced calculus. - Ask questions in the [/forum/ Forum]. - Share some [/inspiration/ Inspiration]. - Post a [/how-to/ How-To] article. Looking for another interesting topic? Check out all of the other [http://www.wonderhowto.com/worlds/ Worlds] on WonderHowTo! [http://flic.kr/p/5w4B85 header credit]
Circumference of a circle example with a radius of 6.5 cm.
Apr 21, 2010

This video teaches us the method to find the circumference of a circle given its radius. The video tells us to find the answer in terms of pi and also to the decimals value. The formula to find the ci ...

A hand holding a blue pen, writing on a piece of paper with a box labeled "A".
Apr 20, 2010

Quadrilaterals are four sided shapes that are closed. They are polygons. Quadrilaterals can be classified broadly in two ways. If the quadrilateral has a two pair of parallel sides then it falls in to ...

"How to Solve for x in the algebra equation -7 + 13x = 58" cover image
Apr 20, 2010

In this video he just explained about how to solve an algebra problem. The problem is -7+13x=58. He just solve the problem in simple steps. First you find out the x in this problem. To find out x you ...

Fractions simplifying exercise with examples: 9/21, 13/30, 15/60, 14/49.
Apr 20, 2010

This video teaches us the method to simplify the fractions. Let us take an example of 18/24. Find a number that goes into both 18 and 24. Divide the top and bottom by the same number. Here, 2 will go ...

Math teacher explaining the area of a trapezoid on a whiteboard.
Apr 20, 2010

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 ...

Reduce the fraction 27/21 to 3 · 9 / 3 · 7. Factor.
Apr 20, 2010

The aim of the video is to show how to reduce a fraction by factoring out prime numbers that are common to both the numerator and the denominator. The example shown in the video is 27/21. The number 2 ...

Calculations showing percentages of 300.
Apr 20, 2010

In this video tutorial, viewers learn how to work out basic percentages. The key is to always find 10% of the number first. To find 10%, divide the number by 10. It's very simple because you simply mo ...

Mathematical diagram showing area calculation of a rectangle with sides labeled 5m and 4m.
Apr 20, 2010

In this video, you will learn how to find the area of a rhombus. The formula is A = 1/2 d1 * d2. The d1 is the diagonal inside the rhombus, while d2 is the other diagonal inside the rhombus. You will ...

Diagram illustrating a parallelogram with labels for base (b) and height (h).
Apr 20, 2010

Parallelogram is a quadrilateral in which both pairs of the opposites are parallel. To find the area of a parallelogram first draw the diagram of a parallelogram. Parallelogram can be further divided ...

Math homework showing step-by-step solutions for solving equations.
Apr 20, 2010

To solve a proportion for a variable you should employ cross multiplication. The basis of cross multiplication is the property which states that the product of the numerator of one fraction and the de ...