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Introduction to Mathplanet

Here is a quick introduction video to Mathplanet, we recommend that you watch this video before you start studying with us:

We hope that you enjoy our material and that your skills in math improve!

To start taking math video lessons online - choose in the right navigation bar above. Under each and every lesson you will find a corresponding math video lesson. Good luck!

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Random lessons

Algebra 1 - Properties of exponents

In earlier chapters we introduced powers. There are a couple of operations you can do on powers and we will introduce them now. We can multiply powers with the same base This is a...

Pre-Algebra - Pyramids, prisms, cylinders and cones

The surface area is the area that describes the material that will be used to cover a geometric solid. When we determine the surface areas of a geometric solid we take the sum of the area for ea...

Geometry - Measure line segments

The length of a line segment can be measured (unlike a line) because it has two endpoints. As we have learnt previously the line segment can be written as While the length or the measure ...

Pre-Algebra - Adding and subtracting integers

You already know how to add 3 + 4 and so on. But there are many ways to add integers. One way to add integers is by using a number line. Example: We always start at zero. Our first ...

Latest forum activity

Single General Adé - the bachelor party

5/18/2012 Elisha88 writes in Mind riddles Before the big day of the wedding, still a great day for the bride and groom is separate from one another to survive. On the traditional bachelor party, couples, celebrate each with their best frie...

perfect wedding location

5/18/2012 Elisha88 writes in Mind riddles First comes the wedding request and immediately after the sometimes less romantic search for an appropriate place for the wedding celebration begins. About the most couples will spend half of their...

Number game

5/15/2012 penhill writes in Algebra 2 This is not an equation, it's an expression. The value of the expression is you first number added by 2. If you subtract 20 rather than 12, the value becomes your first number (x). ((x+5)*4-20)/4...

Maximize the radius

5/11/2012 Gyanesh Kumar Verma writes in Geometry Suppose midpoint of AB is H Angle ABI(I stands for incenter )=ф Angle BCH =Ө As it is clear 2ф+Ө=π/2……………………………&he...

Water tank problem

5/11/2012 Gyanesh Kumar Verma writes in Mind riddles the ovarall rate with which water is being stored in the tank is dv/dt = 1 - v/100 where v is the volume of the water at a particular time dv/(1-v/100)=dt integarting both side ant putting lim...

About Mathplanet

Math planet is an online community where one can study math for free. Take our high school math courses in Pre-algebra, Algebra 1, Algebra 2 and Geometry. We have also prepared practice tests for the SAT and ACT. All material is focused on US high school math but since math is the same all over the world we welcome everybody to study math with us - it is all for free.

Math planet is an online community where one can study math for free. Take our high school math courses in Pre-algebra, Algebra 1, Algebra 2 and Geometry. We have also prepared practice tests for the SAT and ACT. All material is focused on US high school math but since math is the same all over the world welcome everybody to study with us - it is all for free.