Students can Download Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.4 Questions and Answers, Notes Pdf, KSEEB Solutions for Class 7 Maths helps you to revise the complete Karnataka State Board Syllabus and to clear all their doubts, score well in final exams.

## Karnataka State Syllabus Class 7 Maths Chapter 15 Visualising Solid Shapes Ex 15.4

Question 1.

A bulb is kept burning j ust 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:

(i) A ball: The shape of the shadow of the ball will be a circle.

(ii) A cylindrical pipe: The shape of the shadow of a cylindrical pipe will be a rectangle.

(iii) A book: The shape of the shadow of a book will be a rectangle.

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) A circle

3-D objects

Ball, Disc, Plate, etc.

(ii) A square

3-D objects

Die

(iii) A triangle

3-D objects

Ice cream cone, birthday cap

(iv) A rectangle

3-D objects

Book, Bblackboard, ruler, etc.

Question 3.

Examine if the following are true statements:

(i) The cube can cast a shadow in the shape of a rectangle.

Solution:

True.

(ii) The cube can cast a shadow in the shape of a hexagon.

Solution:

False.