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Question 1 - Page 79 - Solid Shapes - Chapter 4 Class 8 - Exploring Some Geometric Themes (Ganita Prakash II
Last updated at February 26, 2026 by Teachoo
Class 8 (Ganita Prakash - 1, 2 & Old NCERT)
Chapter 4 Class 8 - Exploring Some Geometric Themes (Ganita Prakash II
- Fractals
- Sierpinski Carpet
- Sierpinski Gasket
- Figure it out - Page 72
- Koch Snowflake
- Fractals in Art
- Imagining Solids
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Solid Shapes
- Net of a Cube
- Net of other Figures
- Shortest Paths on a Cube
- Projections
- Top view, Front View, Side view
- Shadows as Projections
- Figure it out - Page 95-97
- Isometric Projections
- Drawing on Isometric Grids
- Figure it out - Page 100, 101
Transcript
Question 1 - Page 79 If the congruent polygons of a prism have 10 sides, how many faces, edges and vertices does the prism have? What if the polygons have n sides? Let’s take a 10 sided Prism – a Decogon Faces: You have 1 bottom + 1 top + 10 rectangular side walls. That's 12 faces Formula for an 𝑛-sided base: 𝒏+𝟐 Vertices: There are 10 corners on the top shape, and 10 corners on the bottom shape. That's 20 vertices. Formula for an 𝑛-sided base: 𝟐𝒏 Edges: There are 10 edges on the top, 10 on the bottom, and 10 vertical edges connecting them. That's 30 edges. Formula for an 𝑛-sided base: 𝟑𝒏
