NCERT Solutions for Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.4

Class 7 Maths NCERT Solutions Chapter 15 Visualising Solid Shapes Ex 15.4

Question 1.
A bulb is kept burnings just right above the following solids. Name the shape of the shadows obtained in each case. Attempt to give a rough sketch of the shadow. (You may try to experiment first and then answer these questions).
(i)

(ii)

(iii)

Solution:

Question 2.
Here are the shadows of some 3-D objects, when seen under the lamp of an overhead projector. Identify the solid(s) that match each shadow. (There may be multiple answers for these)
(i)

(ii)

(iii)

(iv)

Solution:

Question 3.
Examine if the following are true statements :

(i) The cube can cast a shadow in the shape of a rectangle.
Solution:
True, the cube can cast a shadow in the shape of a rectangle.

(ii) The cube can cast a shadow in the shape of a hexagon.
Solution:
False, the cube can not cast a shadow in the shape of a hexagon.