NCERT Solutions for class 6, Maths chapter 5 has basic learning concepts of various shapes. This class 6 maths exercise 5.2 is about knowledge of different types of angles explained with clock and directions. The questions in this exercise named as Understanding Elementary Shapes, Exercise 5.2 given below.
Understanding Elementary Shapes, Exercise 5.2
Q.1. What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from
(a) 3 to 9 (b) 4 to 7 (c) 7 to 10
(d) 12 to 9 (e) 1 to 10 (f) 6 to 3
Ans: In clock, one complete clockwise revolution done by hour hand = 3600.
Q.2. Where will the hand of a clock stop if it
(a) starts at 12 and makes ½ of a revolution, clockwise?
(b) starts at 2 and makes ½ of a revolution, clockwise?
(c) starts at 5 and makes ¼ of a revolution, clockwise?
(d) starts at 5 and makes ¾ of a revolution, clockwise?
Ans: One complete clockwise revolution = 3600
Q.3. Which direction will you face if you start facing
(a) east and make ½ of a revolution clockwise?
(b) east and make ½ of a revolution clockwise?
(c) west and make ¾ of a revolution anti-clockwise?
(d) south and make one full revolution?
(Should we specify clockwise or anti-clockwise for this last question? Why not?)
Ans: Revolving one complete round in clockwise or in anti – clockwise direction = 3600
Q.4. What part of a revolution have you turned through if you stand facing
(a) east and turn clockwise to face north?
(b) south and turn clockwise to face east?
(c) west and turn clockwise to face east?
Ans: one complete revolution either in clockwise or in anti-clockwise is = 3600
Q.5. Find the number of right angles turned through by the hour hand of a clock when it goes from
(a) 3 to 6 (b) 2 to 8 (c) 5 to 11
(d) 10 to 1 (e) 12 to 9 (f) 12 to 6
Ans: one complete revolution by hour hand = 3600 or 4 right angles.
Q.6. How many right angles do you make if you start facing
(a) south and turn clockwise to west?
(b) north and turn anti-clockwise to east?
(c) west and turn to west?
(d) south and turn to north?
Ans: Revolving one complete round in clockwise or in anti- clockwise direction = 3600 or 4 right angles.
Q.7. Where will the hour hand of a clock stop if it starts
(a) from 6 and turns through 1 right angle?
(b) from 8 and turns through 2 right angles?
(c) from 10 and turns through 3 right angles?
(d) from 7 and turns through 2 straight angles?
Ans: one complete revolution by hour hand = 3600 or 4 right angles.
Chapter 5 : Understanding Elementary Shapes
Understanding Elementary Shapes, Exercise 5.1
Understanding Elementary Shapes, Exercise 5.2
Understanding Elementary Shapes, Exercise 5.3
Understanding Elementary Shapes, Exercise 5.4
Understanding Elementary Shapes, Exercise 5.5
Understanding Elementary Shapes, Exercise 5.6
Understanding Elementary Shapes, Exercise 5.7