Exercise 15.1 : Solutions of Questions on Page Number : 281
Exercise 15.2 : Solutions of Questions on Page Number : 285
Exercise 15.3 : Solutions of Questions on Page Number : 288
Exercise 15.4 : Solutions of Questions on Page Number : 289
Question 2 :
Here are the shadows of some 3−D objects, when seen under the lamp of an overhead projector. Identify the solids (s) that match each shadow. (There may be multiple answers for these!)
Answer : The given shadows can be obtained in case of the following objects.
i . Compact disk
ii . A dice
iii . Triangular pyramid
iv . Note Book
Q3 : Examine if the following are true statements:
(i) 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.
Answer :
A cube can cast shadow only in the shape of a square. Therefore, any other shapes are not possible.