Haryana State Board HBSE 7th Class Maths Solutions Chapter 15 Visualising Solid Shapes Ex 15.3 Textbook Exercise Questions and Answers.
Haryana Board 7th Class Maths Solutions Chapter 15 Visualising Solid Shapes Exercise 15.3
Question 1.
What cross-sections do you get when you give a
(i) vertical cut
(ii) horizontal cut to the following solids ?
(a) Abrick
(b) Around apple
(c) A die
(d) A circular pipe
(e) An ice cream cone
Solution:
(a) (i) Vertical cut: Here is a brick. When you give the vertical cut to brick you get rectangle. So the cross-section of brick is nearly rectangle in this case.
(ii) Horizontal cut :
When you give the horizontal cut to brick you get rectangle.
So the cross section of brick is nearly rectangle in this case.
(b) (i) Vertical cut : Here is a round apple. When you give the vertical cut to round apple you get nearly circle. So, the cross section is nearly circle in this case.
(ii) Horizontal cut: When you give the horizontal cut to round apple you get nearly circle.
So, the cross-section of round apple is nearly circle.
(c) (i) Vertical cut: Here is a dice. It is like a cube.
When you give a vertical cut, you get a square face. So the cross-section of dice is nearly square in this case.
(ii) Horizontal cut :
When you give the horizontal cut to the dice you get the rectangle. So the cross-section of the dice is nearly rectangle in this case.
(d) (i) Vertical cut: Here is a circular pipe. When you give the horizontal. Cut to circular pipe you get semi cylinder. So, the cross-section of circular pipe is semi cylinder in this case.
(ii) Horizontal cut: When you give the horizontal cut to circular pipe, its cross-section remains same.
(e) (i) Vertical cut: Here is an ice cream cone when you give the vertical cut to an ice cream cone you get nearly triangle. So the cross section of an ice cream cone is nearly triangle.
(ii) Horizontal cone: When you give the horizontal cut to an ice cream cone you get nearly triangle. So the cross section of an ice cream cone is nearly triangle in this case.