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SEBA Class 7 Mathematics Chapter 15 Visualising Solid Shape
Also, you can read the SCERT book online in these sections Solutions by Expert Teachers as per SCERT (CBSE) Book guidelines. SEBA Class 7 General Maths Textual Question Answer. These solutions are part of SCERT All Subject Solutions. Here we have given SEBA Class 7 Mathematics Chapter 15 Visualising Solid Shape Solutions for All Subject, You can practice these here.
Visualising Solid Shape
Chapter – 15
PART – II
Exercise – 15.1
1. Classify the following as two-dimensional and three dimensional objects- Sphere, Circle, Rectangle, Pyramid, Pencil box, Marble, Cube, Quadrilateral, Match box.
Ans: Two-dimensional- Circle, Rectangle, Quadrilateral.
Three-dimensional- Sphere, Pyramid, Pencilbox, Marble, Cube, Matchbox.
2. Write the name of three solid shapes which have no edge and vertex.
Ans: Sphere, football, orange.
3. How many vertices are there in a cone?
Ans: One.
4. Which of the following figures can be used for making cube? Discuss in a group.
Ans: Figures can be used for making cube: (i), (ii), (iii), (iv), (v).
5. Match the shapes of L.H.S. with the shapes of R.H.S.
Ans:
| (i) | (ii) |
| (ii) | (iv) |
| (iii) | (i) |
| (iv) | (iii) |
6. Discuss and identify the following rectilinear figure which can be used to make tetrahedron. Discuss.
Ans: Figure (i), (ii) & (iii) can be used to make tetrahedron.
| Exercise – 15.2 |
1. Draw an isometric sketch by observing the oblique sketch of the rectangle given in the figure.
Ans: An isometric sketch of the rectangle.
2. Draw an Isometric sketch and an oblique sketch having dimensions of 5 cm, 3 cm, 2 cm.
Ans:
An Isometric Sketch.
3. Write the name of a solid shape which has no vertex and plane surface.
Ans: A solid shape which has no vertex and plane surface is a ball.
4. Three cubes having dimensions of 3 cm, 3 cm and 3 cm each are placed one upon another what would be the length, breadth and height of the resulting object. Name it.
Ans: Cuboid; Length = 3 cm, Breadth = 3 cm, Height = 9 cm.
| Exercise – 15.3 |
1. How many cubes are there in Fig (i)
Ans: In the figure-(i), there are 4 Nos. of cube.
2. How many cubes are there in Fig. (ii)? If the dimension of one cube is 2 cm, 2 cm and 2 cm, then find the dimension of the cuboid?
Ans: 16 Nos, Length = 8 cm, Breadth = 4 cm, Height = 4 cm.
3. Draw the views from different direction (front view, top view and side view) by keeping 5 cubes of same dimension one upon another as well as side by side.
Ans:The views from different direction (front view, top view and side view) we shown.
4. Draw a three dimensional figure of Ludo dice that gives the view of 5 dots from the side. If the dice would be seen from top, how many dots are to be seen. (discuss in group)top.
Ans: Three dots will be seen if we view the dice from top.
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