RS Aggarwal Class 7 Math Nineteenth Chapter Three-Dimensional Shapes Exercise 19 Solution

EXERCISE 19

(1) Fill in the blanks:

(i) A cuboid has six rectangular faces 12 edges and 8 vertices.

(ii) A cylinder has 1 curved face and 2 flat faces.

(iii) A cone has one curved face and one flat face.

(iv) A sphere has a curved surface.

(2) Write (T) for true and (F) for false.

(i) A cylinder has no vertex. = True

(ii) A cube has 6 faces, 12 edges and 8 vertices. = True

(iii) A cone has no vertex. = True

(iv) A sphere has one edge. = False

(v) A sphere has a curved surface. = True

(3) Write five examples of each one of

(i) A cone

(ii) A sphere

(iii) A cuboid

(iv) A cylinder