Surface area and volume for class 9
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The document expresses gratitude to a teacher for the opportunity to complete a project that helped the student learn new things about surface area and volume. It defines surface area as the total area of faces and curved surfaces of solids like cubes and cylinders, and volume as the amount of space inside solids like cubes and spheres, with units always being cubic. It also provides formulas for calculating the surface areas of spheres, cylinders, and cones and the volumes of cubes, spheres, cylinders, and cones.
Surface area and volume for class 9
- 2. ACKNOWLEDGEMENT I would like to express my special thanks of gratitude to my teacher MRS. SAVITRI P.N. who gave me this golden opportunity to do this wonderful project, which also helped me in doing a lot of research and I came to know about so many new things. I am not doing this project for marks but to enhance my knowledge. Thank you once again ma’am.
- 3. Surface area is the total area of the faces and curved surface area of a solid figure like CUBE, CUBOID, CYLINDER etc.
- 4. Volume is the measure of the amount of space inside a solid figure like a CUBE,SPHERE,CONE, CYLINDER etc. ITS UNIT IS ALWAYS ‘CUBIC’.
- 15. π)*r*l
- 16. π π π
- 17. 2h π)r
- 19. 2 π)r
- 22. π π