AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1

AP State Syllabus AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1 Textbook Questions and Answers.

AP State Syllabus 8th Class Maths Solutions 13th Lesson Visualizing 3-D in 2-D Exercise 13.1

Question 1.
Draw the following 3-D figures on isometric dot sheet.
AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1 1
Solution:

Question 2.
Draw a cuboid on the isometric dot sheet with the measurements 5 units × 3 units × 2 units.
Solution:
AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1 4

Question 3.
Find the number of unit cubes in the following 3-D figures.
AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1 5
Solution:

Figure	No. of cubes
i)	2 + 3 = 5
ii)	2 × 4 + 1 = 9
iii)	4 + 16 = 20
iv	1 + 4 + 9 = 14

Question 4.
Find the areas of the shaded regions of the 3-D figures given in question number 3.
AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1 5
Solution:

Figure	Area of the shaped regions
i)	3 × 1 × 1 =3 Sq. Units.
ii)	4(2 × 1) + 1 = 9 Sq. Units.
iii)	4 + (16 – 8) = 4 + 8= 12 Sq. Units.
iv)	1 + (4 – 1) ÷ (9 – 4) = 1 + 3 + 5 = 9 Sq.Units.

Question 5.
Consider the distance between two consecutive dots to be 1 cm and draw the front view, side view and top view of the following 3-D figures.
AP Board 8th Class Maths Solutions Chapter 13 Visualizing 3-D in 2-D Ex 13.1 6
Solution: