ML Aggarwal Visualising Solid Shapes  Check Your Progress Class 8 ICSE Ch-17 Maths Solutions. We Provide Step by Step Answer of  Check Your Progress Questions for Visualising Solid Shapes as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-8.

## ML Aggarwal Visualising Solid Shapes Check Your Progress Class 8 ICSE Maths Solutions

 Board ICSE Publications Avichal Publishig Company (APC) Subject Maths Class 8th Chapter-17 Visualising Solid Shapes Writer ML Aggarwal Book Name Understanding Topics Solution of Check Your Progress Edition 2023-2024

Visualising Solid Shapes Check Your Progress

### ML Aggarwal Class 8 ICSE Maths Solutions

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#### Question 1. Write the number of faces, vertices and edges of a

(i) hexagonal pyramid
(ii) octagonal pyramid
(iii) decagonal pyramid
(iv) nonagonal pyramid
(v) heptagonal prism
(vi) decagonal prism.

 Faces Vertices Edges (i) hexagonal pyramid 7 7 12 (ii) octagonal pyramid 9 9 16 (iii) decagonal pyramid 11 11 20 (iv) nonagonal pyramid 10 10 18 (v) heptagonal prism 9 14 21 (vi) decagonal prism 12 20 30

#### Question 2. Give three examples of 3-dimensional shapes around you which are the combinations of 2 or more 3-dimensional shapes.

3-dimensional shapes which are the combination of
2 or more 3-dimensional shapes.
(i) A funnel: Combination of cone and cylinder.
(ii) A toy: Combination of a cone and hemisphere.
(iii) An ice-cream cone: Combination of a cone and hemisphere.
(iv) A circus tent: Combination of a cylinder and a cone.

#### Question 3. Give two examples of solids which are not polyhedrons.

Sides which are not polyhedron:
(i) Cylinder
(ii) Sphere

#### Question 4. Why a pentagonal pyramid having all its edges congruent cannot be a regular polyhedron?

A pentagonal pyramid having all its edges congruent cannot be a regular
polyhedron because all the vertices of it are not formed by the same number of faces.

#### Question 5. In a polyhedron, if F = 8 and V = 12 then find the number of edges.

In a polyhedron,
F = 8, V = 12, then edges
F + V = E + 2
⇒ E = F + V- 2
⇒ Edges = 8 + 12 – 2 = 18