Haryana State Board HBSE 7th Class Maths Solutions Chapter 15 Visualising Solid Shapes Ex 15.4 Textbook Exercise Questions and Answers.
Haryana Board 7th Class Maths Solutions Chapter 15 Visualising Solid Shapes Exercise 15.4
Question 1.
A bulb is kept burning 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).
Solution:
A Ball : The shape of the shadow obtained in case of ball is nearly semi-circle.
Cylindrical pipe : The shape of the shadow obtained in case of cylindrical Pipe is nearly rectangular.
A book: The shape of the shadow obtained in case a book in nearly rectangular.
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 !)
Solution:
(i) Sphere, iii) Cube, cuboid, (iii) Pyramid, cone, (iv) Cylinder.
Question 3.
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.
Solution:
(i) True, (ii) False.