Mathematics Videos

Ratio of areas of two similar triangles

2011-08-02T21:28:00.000+05:30

Ratio of areas of two similar triangles is equal to the square of ratios of their corresponding sides.

Pythagoras theorem proof

2011-08-01T21:20:00.000+05:30

In a right triangle, the square of hypotenuse is equal to the sum of squares of the remaining two sides.

Are the given triangles similar?

2011-07-31T20:48:00.000+05:30

Watch this video...

Similar triangles

2011-07-31T20:29:00.003+05:30

When two triangles are similar, then their corresponding angles are equiangular and corresponding sides are proportional.

Watch the application of this fact in the following problems.

Problem 1

Problem 2

Basic Proportionality theorem

2011-07-30T21:17:00.000+05:30

Watch the demonstration

Basic Proportionality theorem

2011-07-30T21:09:00.000+05:30

Statement- If a line is drawn parallel to one side of a triangle to intersect the other two sides at two distinct points then the other two sides are divided in the same ratio.

Watch this video for its proof

Euclid's Division Lemma

2011-04-13T15:06:00.004+05:30

Line graph (Temp Vs Days of week)

2010-10-20T21:51:00.001+05:30

Learn how to plot temp vs days of week...

Line Graph(Examples)

2010-10-19T21:58:00.000+05:30

What are regular polygons?

2010-10-10T12:46:00.001+05:30

2D and 3D Shapes

2010-10-09T13:46:00.004+05:30

Area of a shape

2010-10-08T00:34:00.001+05:30

Perimeter of a shape

2010-10-08T00:29:00.001+05:30

Multiplying binomials

2010-10-07T10:50:00.001+05:30

Importance of brackets

2010-10-07T10:28:00.000+05:30

Multiplying monomials

2010-10-06T22:56:00.001+05:30

Multiplying monomials

2010-10-06T22:51:00.000+05:30

Learn how to multiply monomials!

Add and subtract monomials

2010-10-05T23:25:00.000+05:30

Making an icosihenagon

2010-10-04T12:20:00.001+05:30

Parts of a circle and circumference

2010-09-29T20:12:00.000+05:30

Equivalent fractions

2010-09-29T19:05:00.000+05:30

Parts of a circle

2010-09-28T20:10:00.001+05:30

Fractions- Parts of a whole

2010-09-28T18:58:00.000+05:30

Drawing a circle with a compass

2010-09-27T20:02:00.000+05:30

Real Number Line

2010-09-23T19:52:00.000+05:30

Number system tour

2010-09-21T18:23:00.000+05:30

Real Number System

2010-09-20T19:41:00.000+05:30

Watch this video...It talks about types of numbers starting from natural numbers.

Subtracting integers

2010-09-18T18:48:00.000+05:30

Subtraction of integers

2010-09-18T18:39:00.000+05:30

9 times table writing technique

2010-09-17T16:09:00.000+05:30

Multiplication is Easy

2010-09-08T16:06:00.001+05:30

Basic terms circle

2010-09-08T13:23:00.001+05:30

Gradient of a line

2010-09-08T11:12:00.000+05:30

Coordinate System

2010-09-07T11:04:00.000+05:30

Learn the basic concepts about coordinate geometry

Sum of measures of interior angles of a polygon

2010-09-06T12:43:00.000+05:30

What is a Polygon?

2010-09-05T12:40:00.000+05:30

Types of Polygons

2010-09-04T12:33:00.002+05:30

Perimeter of a rectangle

2010-08-15T00:24:00.000+05:30

Perimeter of a shape

2010-08-14T00:21:00.002+05:30

Area of a square

2010-08-09T00:15:00.001+05:30

How to find the arae of a square?

Area of a rectangle

2010-08-08T00:12:00.000+05:30

Fundamental Theorem of Arithmetic

2010-04-10T14:58:00.003+05:30

Quadratic equations- Completing the square method

2010-02-18T08:27:00.002+05:30

Sum of three interior angles of a triangle

2010-02-06T15:31:00.000+05:30

Area of trapezium (problem)

2010-01-11T14:12:00.000+05:30

Area of trapezium formula (Visualise)

2010-01-10T14:07:00.002+05:30

Area of trapezium

2010-01-09T14:03:00.001+05:30

Cool Videos on Paper snowflakes

2010-01-05T14:33:00.000+05:30

Definition of a trapezoid

2010-01-04T14:14:00.000+05:30

Making a square root spiral

2009-09-09T10:58:00.001+05:30

Application of Pythagoras theorem...

How to make Jacob's ladder?

2009-09-04T12:40:00.001+05:30

Read About Jacob's ladder

Watch this video...its interesting

Creative Fun:
How To Make A 'Jacob's Ladder' Toy

How to make a pop up dodecahedron

2009-08-05T21:51:00.000+05:30

I found this video very creative.

Solving pair of linear equations-elimination method

2009-04-25T19:32:00.004+05:30

Example 1
9x-4y=2000 …..(1)
7x-3y=2000 …..(2)
Multiplying equation (1) by 3 and equation (2) by 4 we get
27x-12y=6000 …..(3)
28x-12y=8000 …..(4)
Eliminate y by subtracting equation (3) from equation (4)
(28x-27y)-(12y-12y)=8000-6000
x= 2000 …..(5)
Put value of x from equation(5) in (1) to get y
y= 4000

Ans x= 2000, y=4000

Example 2

Can we solve the given pair of equations ?

2x+3y=8 4x+6y=7

2x+3y=8 …..(1)
4x+6y=7…..(2)
Multiplying equation (1) by 2 and equation (2) by 1 we get
4x+6y=16 ….(3)
4x+6y=7 …..(4)
Eliminate y by subtracting equation (4) from equation (3)
(4x-4y)-(6y-6y)=16-7
0= 9 …..(5)
It is a false statement. So, no solution

Mobius Strip Experiment

2008-12-10T19:05:00.002+05:30

Dear students,
I liked this video explaining about making a Mobius Strip and then further experimenting with it. Try this!

Angle Sum Property...Triangle

2007-12-05T12:51:00.002+05:30

This video helps in visualising the result "Sum of three interior angles of a triangle is 180 degrees" by paper cutting and pasting.

Visualising Angle in a semicircle

2007-10-29T11:33:00.002+05:30

This is a video created for explaining the concept of angle in a semicircle using an Open Source software GeoGebra.

The video is a screen capture made by another open source software Cam Studio.

Visualising algebraic formula (a+b)^2

2007-10-29T10:54:00.002+05:30

This video is all about visualising the geometrical interpretation of algebraic formula (a+b)^2 by paper cutting and pasting.

Visualising Area of a circle by an activity method

2007-10-29T10:14:00.001+05:30

This is a photo story to derive the formula for area of a circle by an activity method . This activity is based on transforming one figure into another and then calculating the area.

The students watch this video and then do the hands-on activity. This method of learning the concepts helps in understanding the geometrical aspects of the mathematics.

General point on x-axis/y-axis

2007-10-29T09:35:00.002+05:30

This video is created for visualising the concept of a general point on x -axis/y-axis.

To multiply a number by 11

2007-10-29T09:26:00.001+05:30

This video explains a short cut method to multiply a number by 11.

Squaring a number ending with 5

2007-10-29T07:46:00.001+05:30

I have realised that exposure to vedic mathematics short cut methods is essential for students for improving their mental mathematics skill. In my free class period I show them the videos on how to use these tricks.After that I give them practice questions.

This video is explaining a short cut method to find the square of a number ending with 5 using a vedic mathematics sutra

This means "By one more than the previous one"

I am sharing one example how this sutra is applied?

65^2= [6 X (6+1)] 25 = 4225

For this number , the last digit is 5 and the 'previous' digit is 6. Hence, 'one more than the previous one', that is, 6+1=7.

The Sutra, in this context, gives the procedure 'to multiply the previous digit 6 by one more than itself, that is, by 7'. It becomes the L.H.S of the result, that is, 6 X 7 = 42.

The R.H.S of the result 25..

To multiply two numbers nearing 100

2007-10-29T07:19:00.002+05:30

This is a video which has been prepared using an open source screen capturing software Cam Studio.

Aim: To learn how to multiply two numbers nearing 100 by a shortcut method.

Utility: These kinds of tricks develop a skill of oral calculations and helps in saving students time in various competetive examinations.It instill confidence in students that they can do mathematics thus helps in removing a fear for learning mathematics.