MATHEMATICS V

Solutions Chapter 5 – Does it Look the Same?

Page No 73:

Question 1:

Which shapes are divided into two mirror halves by the dotted line? 

Answer:

Shapes that are divided into two mirror halves by the dotted line are: 

 

Page No 74:

Question 1:

Look at the figure in the white box. One which of the dotted lines will you keep the mirror so that you get shape (b)? Also tell which part of the picture will be hidden when we keep the mirror on the dotted line. 

Answer:

We will keep the mirror on a vertical dotted line to get shape (b). Right part of the image will be hidden if we keep the mirror on a vertical dotted line.

Page No 75:

Question 1:

Now make a line one the white box to show where you will keep the mirror to get the picture next to it. 

Answer:

 

Page No 76:

Question 1:

Venky has made a red and white shape. Make a line on the white box where you will keep a mirror to get that shape. Look at how the line is drawn in the first box to get the picture next to it. 

Answer:

(b) 

(c)

(d)

(e)

Page No 78:

Question 1:

Guess which of the shapes below would look the same after half a turn.

Answer:

Page No 79:

Question 1:

(1) Find out which letters in the English alphabet look the same after half a turn. (2) Which of these English words reads the same on half a turn? ZOOM, MOW, SWIMS, SIS, NOON (3) Give half a turn to the numbers from 0 to 9. Find which of them still looks the same. (4) Think of all 2, 3 and 4 digit numbers which look the same on half a turn.

Example 2 digit numbers 1 1, _______, _______ 3 digit numbers 1 0 1, 1 1 1, _______, _______, _______, _______, _______, ________ 4 digit numbers 1 00 1, 1 1 1 1, _______, ________, ________, ________, ________

Answer:

(1) H, I, X, N, S, Z and O.

(2) MOW, SWIMS, SIS, and NOON read the same on half a turn.

(3) 0, 1 and 8 are the numbers that look the same after half a turn.

(4) 2 digit numbers that look the same on half a turn are 1188. 3 digit numbers that look the same on half a turn are 101111808888818181, 4 digit numbers that look the same on half a turn are 100111118008888881181881.

Page No 80:

Question 1:

Which among the following pictures will look the same on half a turn? 

Answer:

Page No 82:

Question 1:

• Among the following shapes, find out which ones would look the same after

14turn. Put a (✓). • Put a (✕) on the shapes that will not look the same after half a turn. 

Answer:

Page No 83:

Question 1:

Try and change the shapes in such a way that the new shape remains the same on giving it half a turn. 

Answer:

Page No 84:

Question 1:

Draw what the following shapes would look like on

14turn and half a turn. 

Which of the above shapes do not look the same on

14turn? Which shapes do not look the same on

12a turn?

Answer:

Image (a), (c) and (d) do not look the same on

14turn. Image (a) does not look the same on

12turn.

Question 2:

Which fan will look the same on a

13turn? 

Answer:

Fan (a) will look the same on

13turn.

Question 3:

Draw this shape after

13turn. 

Answer:

Shape after

13turn:

Page No 85:

Question 1:

• Can you see that this shape looks the same on

16turn? 

• Look at the following shapes. Draw how they will look on

13 and 16turn.

Answer:

Page No 86:

Question 1:

Look at the following shapes ― (a) Find out which of these figures look the same on

13turn. Mark them with (✓). (b) Which are the ones that will not look the same after

13turn? Mark them with (✕). 

(c) Try and change the shapes below in such a way that they look the same on

13turn. 

Answer:

(a) and (b) 

(c) 

Question 2:

• Draw some shapes which will look the same after

13turn. • Draw some shapes which will look the same after

16turn.

Answer:

  • Figures that look the same after 13turn:

  • Figures that look the same after 16turn:

  Disclaimer: The answers may vary from student to student, based on his/her experience. The answers provided here are for reference only.

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