**NCERT Class 9 Maths Lab Manual**

- Activity 1 – Construct a Square Root Spiral
- Activity 2 – Represent Some Irrational Numbers on the Number Line
- Activity 3 – Verify the Algebraic Identity (a+b)² = a² + 2ab+b²
- Activity 4 – Verify the Algebraic Identity (a-b)² = a²- 2ab+b²
- Activity 5- Verify the Algebraic Identity a² – b² = (a+b) (a-b)
- Activity 6 – Verify the Algebraic Identity(a+b+c)² = a²+b²+c²+2ab+2bc+2ca
- Activity 7 – Verify the Algebraic Identity (a+b)³ = a³+b³+ 3a²b + 3ab²
- Activity 8 – Verify the Algebraic Identity (a – b)³ = a³ – b³ – 3ab (a – b)
- Activity 9 – Verify the Algebraic Identity a³+b³ = (a+b) (a²-ab+b²)
- Activity 10 – Verify the Algebraic Identity a³-b³ = (a-b) (a²+ab+b²)
- Activity 11 – Verify that if Two Lines Intersect each Other
- Activity 12 – Verify that the Sum of the Angles of a Triangle is 180°
- Activity 13 – Verify Exterior Angle Property of a Triangle
- Activity 14 – Verify the Different Criteria for Congruency of Triangles
- Activity 15 – Verify that in a Triangle, Longer Side has the Greater Angle
- Activity 16 – Find the Values of Abscissae
- Activity 17 – Find a Hidden Picture by Plotting
- Activity 18 – Verify that the Sum of the Angles of a Quadrilateral is 360°
- Activity 19 – Find the Formula for the Area of a Trapezium
- Activity 20 – Verify that the Parallelograms on the Same Base
- Activity 21 – Verify that the Triangles on the Same Base
- Activity 22 – Verify that the Ratio of the Areas of a Parallelogram
- Activity 23 – Verify that the Angle Subtended by an Arc of a Circle
- Activity 24 – Verify that the Angles in the Same Segment of a Circle are Equal
- Activity 25 – Verify that the Opposite Angles of a Cyclic Quadrilateral
- Activity 26 – Form a Cube and Find the Formula for its Surface
- Activity 27 – Form a Cuboid and Find the Formula for its Surface Area
- Activity 28 – Form a Cone from a Sector of a Circle
- Activity 29 – Find a Formula for the Curved Surface Area of a Cylinder
- Activity 30 – Find the Relationship among the Volumes of a Cone
- Activity 31 – Obtain the Formula for the Surface Area of a Sphere
- Activity 32 – Draw Histograms for Classes of Equal Widths and Varying Widths
- Activity 33 – Find Probability of Unit’s Digit of Telephone Numbers
- Activity 34 – Find Probability of each Outcome or a Die

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