Gujarat Board GSEB Textbook Solutions Class 6 Maths Chapter 5 Understanding Elementary Shapes InText Questions and Answers.

## Gujarat Board Textbook Solutions Class 6 Maths Chapter 5 Understanding Elementary Shapes InText Questions

Try These (Page 88)

Question 1.

Take any post card. Use the above technique to measure its two adjacent sides.

Solution:

Do it yourself.

Question 2.

Select any three objects having a flat top. Measure all sides of the top using a divider and a ruler

Solution:

Do it yourself.

Try These (Page 91)

Question 1.

What is the angle name for half a revolution?

Solution:

2 straight angles = 1 revolution

\(\frac { 1 }{ 2 } \)[2 straight angles] = \(\frac { 1 }{ 2 } \)[1 revolution]

or A straight angle = \(\frac { 1 }{ 2 } \) revolution

Thus, half a revolution means a straight angle.

Question 2.

What is the angle name for one-fourth revolution?

Solution:

4 right angles = 1 revolution

A right angle = \(\frac { 1 }{ 4 } \) revolution

Thus, one-fourth revolution means a right angle.

Question 3.

Draw five other situations of one-fourth, half and three-fourth revolution on a clock

Solution:

(i) One-fourth revolution [i.e. a turn of a right angle]

For one-fourth revolution, the clock hand moves from:

(a) 12 to 3

(b) 3 to 6

(c) 1 to 4

(d) 9 to 12

(e) 6 to 9

(ii) Half-revolution [i.e. a turn of a straight angle]

For a half-revolution, the clock hand moves from:

(a) 12 to 6

(b) 3 to 9

(c) 1 to 7

(d) 2 to 8

(e) 4 to 10

(iii) Three-fourth revolution [i.e. a turn of 3 right angles]

Note: There is no special name for three-fourth of a revolution.

For a three-fourth revolution, the clock-hand moves from:

(a) 12 to 9

(b) 1 to 10

(c) 3 to 12

(d) 6 to 3

(e) 9 to 6

Try These (Page 93)

Question 1.

The hour hand of a clock moves from 12 to 5. Is the revolution of the hour hand more than l right angle?

Solution:

Yes, the revolution of the hour hand from 12 to 5 is more than 1 right angle.

Question 2.

What does the angle made by the hour hand of the clock look like when it moves from 5 to 7? Is the angle moved more than l right angle?

Solution:

No, in this case the angle is less than a right angle.

Question 3.

Draw the following and check the angle with your RA tester.

(a) going from 12 to 2

(b) from 6 to 7

(c) from 4 to 8

(d) from 2 to 5

Solution:

(a) Going from 12 to 2: The angle formed by the hour hand in going from 12 to 2 is shown in the figure alongside. Checking this angle by RA [right angle] tester, we find that it is less than a right angle.

(b) Going from 6 to 7: Checking the angle formed by RA tester, we find that it is less than a right angle.

(c) Going from 4 to 8: Checking the angle so formed by RA tester, we find that it is greater than a right angle.

(d) Going from 2 to 5: Checking the angle so formed by RA tester, we find that it is equal to a right angle.

Question 4.

Take five different shapes with corners. Name the corners. Examine them with your tester and tabulate your results for each case:

Solution:

It is an activity. Do it yourself.

Try These (Page 94)

Question 1.

Look around you and identify edges meeting at corners to produce angles. List ten such situations.

Solution:

Do it yourself.

Question 2.

List ten situations where the angles made are acute.

Solution:

Do it yourself.

Question 3.

List ten situations where the angles made are right angles.

Solution:

Do it yourself.

Question 4.

Find five situations where obtuse angles are made.

Solution:

Do it yourself.

Question 5.

List five other situations where reflex angles may be seen.

Solution:

Do it yourself.