Q.1 Give two new examples of each of the for three-dimensional shapes :
(i) Cone (ii) Sphere (iii) Cylinder (iv) Cuboid (v) Pyramid
Sol.1 :
(i) A school bell and a funnel.
(ii) A tennis ball and a model of a globe.
(iii) Drink cans and delivering pipes for a water and gas.
(iv) A match box and brick.
(v) A paper- weight and a tower like the Eiffel tower.
Q.2 What is the shape of :
(i) instrument box
(ii) a brick
(iii) a match box
(iv) a rod- roller
(v) a sweet laddoo
Sol.2 :
(i) My instrument box is in the shape of a cuboid.
(ii) A brick is in the shape of the cuboid.
(iii) A match – box is in the shape of a cuboid.
(iv) A road – roller is in the shape of a cylinder.
(v) A sweet laddoo is shaped like a sphere.
Q.1. Total number of faces of a cuboid is
(a) 4 (b) 6 (c) 8 (d) 12
Sol. 1 :
(b) 6
Q.2.Total number of edges of a cuboid is
(a) 4 (b) 6 (c) 8 (d) 12
Sol.2 :
(d) 6
Q.3. Number of faces of a cuboid is
(a) 4 (b) 6 (c) 8 (d) 12
Sol.3 :
(c) 8
Q.4. Which one of them is example of cuboid?
(a) a dice (b) a football (c) a gas pipe (d) an ice- cream cone
Sol.4 :
(a) A dice
Q.5. A brick is an example of
(a) cube (b)cuboid (c) prism (d) cylinder
Sol.5 :
(b) Cuboid
Q.6. A gas pipe is an example of
(a)cone (b)a cylinder (c)cube (d)sphere
Sol.6 :
(b) A cylinder
Q.7. If the base radius and height of a right circular cone are 3 cm and 4 cm in lengths, then the slant height is
(a) 5 cm (b) 2 cm (c)25 cm (d)6 cm
Sol.7 :
(a) 5 cm
L =
Q.8. The number of faces of a triangular pyramid is
(a) 3 (b) 4 (c) 6 (d) 8
Sol.8 :
(b) 4
A pyramid is called a triangular pyramid if its base is a triangle.
Q.9. The number of edges of a triangular pyramid is
(a) 3 (b) 4 (c) 6 (d) 8
Sol.9 :
(c) 6
Q.10. A tetrahedron is a pyramid whose base is a
(a) triangle (b) square (c) rectangle (d) quadrilateral
Sol.10 :
(a) Triangle
1. What are three-dimensional shapes? |
2. What is the difference between two-dimensional and three-dimensional shapes? |
3. Can you give some examples of three-dimensional shapes? |
4. How can we calculate the volume of a three-dimensional shape? |
5. What is the importance of understanding three-dimensional shapes? |
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