Exercise 15
Question 1
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1. The adjoining net is made up of two equilateral triangles and three rectangles.
(i) Name the solid it represents.
(ii) How many faces, edges and vertices does this solid have ?
2. For each solid, count the number of faces, vertices and edges. Check if the Euler's rule is true for each one.
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3. Name the solids that have :
(i) 4 faces
(ii) 1 curved surface
(iii) 6 faces
(iv) 5 faces and 5 vertices
(v) 8 triangular faces
(vi) 6 rectangular faces and 2 hexagonal faces.
4. Name the different plane shapes needed to draw the net of:
(i) a cube
(ii) a triangular prism
(iii) a triangular pyramid
(iv) a cylinder
5.Given here is the net of an octahedron with numbers 0 to 7 on the faces.Enlarge these on a cardboard to make a model
(i) How many faces, edges and vertices does this solid have ?
(ii) Check whether Euler's rule is true for the octahedron or not.
6. Draw the 2-D representation of a
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7. On an isometric dotted paper draw the following shapes:
(i) cube
(ii) cuboid
(iii) hexagonal prism
(iv) pentagonal prism
8. Name the solid that would be formed by each net :
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Multiple Choice Questions (MCQs)
9. Which of the following solid shapes has the side
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10. Manya is building prism using straws and balls of clay. How many straws does she need to build a pentagonal prism ?
(a) 18
(b) 15
(c) 20
(d) 13
High Order Thinking Skills (HOTS)
11. How many triangles will the net of hexagonal pyramid contain ?
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