# Maths IX

## Class 9 Videos

### Sets

### Profit And Loss

### Commission And Tax

### Home Arithmetic

- Energy Bill Calculation
- Water Bill Calculation
- Rules of Telephone Charge and Bill Calculation
- Taxi Bills

### Mensuration ( Area)

### Area And Volume Of Solid Objects

- Area and Volume of Solid Objects
- Problems Related to Area and Volume of Solid Objects
- Cost Related to Volume

### Hcf And Lcm

### Indices

### Ratio And Proportion

### Linear Equation

- Substitution Equation to Solve Linear Equation
- Elimination Method to Solve Linear Equation
- Graphical Method to Solve Linear Equation

### Quadratic Equation

- Solution of Quadratic Equation By Method of Factorization
- Solution of Quadratic Equation by the Method of Completing Square
- Solution of Quadratic Equation by Using Formula

### Triangles

- Introduction and Sum of Angles of any Triangle is Equal to two Right Angles
- Exterior Angle of a Triangle is Equal to Sum of Two Opposite Interior Angles
- The Perpendicular Drawn From the Vertex of an Isosceles Triangle Bisects the Angle
- Condition for Congruency and Base Angles of an Isosceles Triangles are Equal
- Sides Opposite to Equal Angles of a Triangle are Equal and Bisector Theorem
- Mid-Points of any Two Sides of a Triangle is Parallel to the Third Side
- Problems Related to Triangle Theorem

### Parallelogram

- Introduction to Parallelogram
- If the Opposite Angles of a Quadrilateral are Equal , Then It is Parallelogram
- The Diagonals of a Parallelogram Bisect Each Other
- Problems Related to Parallelogram
- Miscellaneous Problems for Triangles and Parallelogram

### Construction

- Construction of Quadrilaterals
- Construction of Rectangle
- Construction of Parallelogram – I
- Construction of Parallelogram – II
- Construction of Rhombus

### Similarity

### Circle

### Trigonometry

- Introduction to Trigonometry
- Trigonometric Ration of Standard Angles
- Problems Related to Trigonometric Ratios

### Statistic

- Introduction to Statistics and Line Graph
- How to draw Pie Chart?
- Histogram
- How to draw Ogive Curve?
- Mean: Rules to Find mean in Individual, Discrete Series
- Median, Mode and Quartiles