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Mensuration of 3D Shapes - Part 1 (in Malayalam)
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First lesson describes the basic difference of 2d and 3d shapes. Ideas to remember the equations of cuboid and cube using concepts of rectangle and square. Once you are familiar with 2d shapes you can easily remember equations of 3d shapes.Equations for finding volume & surface area of cuboid and cube are explained in detail with their basic concepts too.

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1. MENSURATION OF 3D SHAPES Part 1 BASIC CONCEPTS VOLUME 8 SURFACE AREA EXCLUSIVE TRICKS Follow my Profile for more classes, ISMAIEL KALADY

2. Course Overview Basics of 3D Shapes Volume & Surface Area of all 3D Shapes How to remember Equations? All Types of Problems Previous Year PSC Questions smaiel Kalady

3. 2-D vs. 3-D Shapes v Two-dimensional (2D) shape has only has two measurements, such as length and height, and is usually called a 'flat' shape. Rectangle, square, triangle, circle, etc... VThree-dimensional (3D) shape because it has three measurements (length, height, and width) and is sometimes called a 'solid' shape Cube, Cuboid, Cylinder, Cone, Sphere, etc Ismaiel Kalady

4. Recap of 2D Shapes ( basics) Rectangle Square 2 A a P 2(l b) Ismaiel Kalady

5. Recap of 2D Shapes ( basics) Circle smaiel Kalady

6. Cuboid Equations Figure Ismaiel Kalady

7. Cuboid Equations Figure Volume of a cuboid 1x b x h Total surface area 2 (lb + bh +Ih) Ismaiel Kalady

8. Cuboid Equations Figure Volume of a cuboid 1x b x h Total surface area 2 (lb + bh +Ih) Longest diagonal of a cuboid - Ismaiel Kalady

9. Cube Equations Figure In cube, l = b = h = ,a, Ismaiel Kalady

10. Cube Equations Figure In cube, l b h a' Volume of a cube a >< a >< a Total surface area- 6a2 a3 Ismaiel Kalady

11. 1. Volume of a cube is 64 cm3.Then its total surface area is: Ans: smaiel Kalady

12. 1. Volume of a cube is 64 cm3.Then its total surface area is: Ans: Volume = a3-64cm" a-V64 = 4cm Total Surface area = 6a2-6 42 =6 16 = 96 cm? smaiel Kalady

13. 2. The maximum length of a pencil that can be kept in a rectangular pencil box of dimensions 8cm x 6cm x 2cm is: a) 2/13 cm b)2V14cm c) 2/26cd) 10/2 cm Ans: Longest diagonal of a cuboid b2 +h2 b) 2V14 cm c) 2V26 cm 182 + 62 + 22 Ismaiel Kalady

14. 2. The maximum length of a pencil that can be kept in a rectangular pencil box of dimensions 8cm x 6cm x 2cm is: a) 2/13 cm b)2V14cm c) 2/26cd) 10/2 cm Ans: Longest diagonal of a cuboid b2 +h2 b) 2V14 cm c) 2V26 cm - V82 62+22 - V64 + 36 + 4 V104 Ismaiel Kalady

15. 2. The maximum length of a pencil that can be kept in a rectangular pencil box of dimensions 8cm x 6cm x 2cm is: a) 2/13 cm b)2V14cm c) 2/26cd) 10/2 cm Ans: Longest diagonal of a cuboid b) 2V14 cm c) 2V26 cm 10V2 cm b2 +h2 - V82 62+22 - V64 + 36 + 4 - V104 - 2/26 cm Ismaiel Kalady