Class 7 Exam > Class 7 Notes > Mathematics (Maths) Class 7 (Old NCERT) > Mind Map- Visualising Solid Shapes
Mind Map- Visualising Solid Shapes | Mathematics (Maths) Class 7 (Old NCERT) PDF Download
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FAQs on Mind Map- Visualising Solid Shapes - Mathematics (Maths) Class 7 (Old NCERT)
| 1. What are solid shapes and how are they different from 2D shapes? |  |
Ans. Solid shapes, also known as three-dimensional shapes, have depth, width, and height, which gives them volume. Examples include cubes, spheres, cylinders, and cones. In contrast, 2D shapes, or two-dimensional shapes, only have length and width, such as squares, circles, and triangles. The key difference is that solid shapes occupy space, while 2D shapes do not.
| 2. Can you explain the properties of different solid shapes? | |
Ans. Yes, different solid shapes have unique properties. For example, a cube has 6 faces, all of which are squares, 12 edges, and 8 vertices. A sphere has no edges or vertices and is perfectly round. A cylinder has 2 circular faces, 1 curved surface, 2 edges, and no vertices. Understanding these properties helps in visualizing and differentiating between solid shapes.
| 3. How do you calculate the volume of solid shapes? | |
Ans. The volume of solid shapes can be calculated using specific formulas. For a cube, the volume is calculated as V = side³. For a rectangular prism, it is V = length × width × height. The volume of a cylinder is V = πr²h, where r is the radius and h is the height. For a sphere, the formula is V = (4/3)πr³. Each shape has its own formula based on its dimensions.
| 4. What are some real-life examples of solid shapes? | |
Ans. Solid shapes are prevalent in our everyday life. For instance, a dice is a cube, a basketball is a sphere, a soda can is a cylinder, and a party hat is in the shape of a cone. Recognizing these shapes in real-life objects helps reinforce the understanding of solid shapes and their properties.
| 5. How can we identify different solid shapes visually? | |
Ans. To identify solid shapes visually, look for their distinct characteristics: check the number of faces, edges, and vertices. You can also observe the shape's outline from different angles. Using models or drawings can help in visualizing solid shapes better, making it easier to differentiate between them based on their features.
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Document Description: Mind Map- Visualising Solid Shapes for Class 7 2025 is part of Mathematics (Maths) Class 7 (Old NCERT) preparation.
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