Chapter-5 ➤ Understanding Elementary Shapes 1. Through what angle measure does the hour hand of a clock turn through, when it goes from 3 to 9? 90° 360° 180° none of these 2. Find the number of right angles turned through by the hour hand of a clock when it goes from 3 to 12. 1 2 3 4 3. Through what angle measure does the hour hand of a clock turn through, when it goes from 12 to 9? 360° 180° 270° 90° 4. Which of the following angles is the measure of an acute angle? 30° 90° 120° 210° 5. The measure of an acute angle is < 90° > 90° = 90° none of these 6. A triangle having three equal sides is called a scalene triangle an isosceles triangle an equilateral triangle a right triangle 7. What part of a revolution have you turned through if you stand facing east and turn clockwise to face west? ¼ ½ ¾ none of these 8. How many right angles do you make if you start facing north and turn clockwise to south? 1 2 3 4 9. How many right angles do you make if you start facing south and turn clockwise to east? 1 2 3 4 10. Find the number of right angles turned through by the hour hand of a clock when it goes from 12 to 3. 1 2 3 4 Loading … Question 1 of 10
